15PTS HELP ASAP PLEASE! A scientist has two solutions, which she has labeled Solution A and Solution B. Each contains salt. She knows that Solution A is 65% salt and Solution B is 90% salt. She wants to obtain 160 ounces of a mixture that is 70% salt. How many ounces of each solution should she use?

The lengths of the three sides are 14 feet, 19 feet and 23 feet respectively.

The formula for determining the perimeter of a triangle is expressed as;

Perimeter = a + b + c

Where; a, b and c are the length of the sides

From the information given, we have that;

56 = 2z- 5 + 5 + z + z

collect like terms

56 = 4z

Make 'z' the subject of formula

z = 56/4

z = 14

Shortest side, z = 14 feet

Second side, y = 5 + z = 19 feet

Third side, x = 2z - 5 = 2(14) - 5 = 23 feet

Hence, the values are 14 feet, 19 feet and 23 feet respectively.

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Answer:

The tail of a 1-mile long train exits a tunnel exactly 3 minutes after the front of the train entered the tunnel. If the train is moving 60 miles per hour, how long is the tunnel? Hint : How far does the front of the train move in 3 minutes?

Explanation

The front of the train moves 3 miles in 3 minutes. Therefore, the tunnel must be 1 mile long.

Answer:

2 miles long

Step-by-step :

The tail of the train starts one mile from the mouth of the tunnel and it must travel that distance plus the length of the tunnel in 3 minutes.

Let t = tunnel length

t + 1  = distance the tail must travel in 3 minutes.

3 minutes = 1/20 hr

(t+1) miles  /  60 m/hr  = 1/20 hr

t + 1 = 60/20

t+1 = 3

Subtract 1 from each side:

t = 2

The tunnel is 2 miles long.

The ratio of the mass of Earth to the mass of Jupiter is equal to 3.14*10⁻³, thus option B is correct.

An ordered pair of numbers a and b, represented as a / b, is a ratio if b is not equal to 0. A proportion is an equation that sets two ratios at the same value. For instance, you could express the ratio as follows: 1: 3 if there is 1 boy and 3 girls (for every one boy there are 3 girls)

Given, the mass of Earth = 5.97*10²⁴ kg

Also, mass of Jupiter = 1.90*10²⁷ kg

Hence, ratio of mass of Earth to Jupiter is calculated by dividing mass of Earth upon the mass of Jupiter.

Ratio = (5.97*10²⁴/1.90*10²⁷ )

= 3.14*10²⁴⁻²⁷

= 3.14*10⁻³

Thus, the ratio of the mass of Earth to the mass of Jupiter is equal to 3.14*10⁻³, thus option B is correct.

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The equation of the parabola would be [tex]y = \frac{1}{4}(x + 1)^2 - 4[/tex].

What is a parabola?

A parabola is a curve that is shaped like a U or a mirror image of a U. It is a type of conic section, which is a curve that is formed by the intersection of a plane and a cone.

The equation of a parabola can be written in the form y = a(x - h)^2 + k, where (h, k) is the vertex of the parabola and a is a coefficient that determines the shape of the curve.

To find the equation of the parabola described in the problem, we can first find the values of h and k and then substitute them into the equation.

We know that the vertex of the parabola is (-1, -4). Therefore, h = -1 and k = -4.

Substituting these values into the equation y = a(x - h)^2 + k, we get:

y = a(x - (-1))^2 + (-4)

= a(x + 1)^2 - 4

Now we can use the fact that the parabola passes through the points (-5, 0) and (3, 0) to find the value of a.

Substituting x = -5 into the equation, we get:

y = a((-5) + 1)^2 - 4

= a(4)^2 - 4

= 16a - 4

Since the point (-5, 0) lies on the parabola, y must equal 0 when x = -5. Therefore, we have the equation 16a - 4 = 0. Solving for a, we find that a = 1/4.

Substituting this value back into the equation for y, we get:

[tex]y = \frac{1}{4}(x + 1)^2 - 4[/tex]

Hence, the equation of the parabola would be [tex]y = \frac{1}{4}(x + 1)^2 - 4[/tex].

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The equation of the parabola would be [tex]y=\frac{1}{4}(x+1)^2-4[/tex].

What is a parabola?

A parabola is a curve that is shaped like a U or a mirror image of a U. It is a type of conic section, which is a curve that is formed by the intersection of a plane and a cone.

The equation of a parabola can be written in the form y = a(x - h)^2 + k, where (h, k) is the vertex of the parabola and a is a coefficient that determines the shape of the curve.

To find the equation of the parabola described in the problem, we can first find the values of h and k and then substitute them into the equation.
We know that the vertex of the parabola is (-1, -4). Therefore, h = -1 and k = -4.
Substituting these values into the equation y = a(x - h)^2 + k, we get:
y = a(x - (-1))^2 + (-4)
= a(x + 1)^2 - 4
Now we can use the fact that the parabola passes through the points (-5, 0) and (3, 0) to find the value of a.
Substituting x = -5 into the equation, we get:
y = a((-5) + 1)^2 - 4
= a(4)^2 - 4
= 16a - 4
Since the point (-5, 0) lies on the parabola, y must equal 0 when x = -5. Therefore, we have the equation 16a - 4 = 0. Solving for a, we find that a = 1/4.
Substituting this value back into the equation for y, we get:

[tex]y=\frac{1}{4}(x+1)^2-4[/tex].
Hence, the equation of the parabola would be [tex]y=\frac{1}{4}(x+1)^2-4[/tex].

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Answer:

Step-by-step explanation:

A: If she were to travel 1 block every minute it would take 24 minutes because there are 24 blocks but if she were to travel two blocks every minute it would take 12 minutes because 24/2 is 12.

B: 1=24, 2=12, 3=8, 4=6, 6=4, 8=3, 10=2 4/10, 12=2, and 24=1

C: The speed causes the time to change because the faster she goes the quicker she will get there.

D: No, because the time it takes her constantly changes with there being no constant rate.

Answer:

4

Step-by-step explanation:

Constant of proportionality is the same as slope in the context of a linear function, which is defined as Δy / Δx. We can find this by taking two points and finding the difference in their x- and y-coordinates.

I'll use (1, 4) and (2, 8).

[tex]\textrm{slope}=\dfrac{8-4}{2-1} = \dfrac{4}{1} = 4[/tex]

Answer:

84%

Step-by-step explanation:

21/25=?/100  ==> decimal value is dividing a number by 100

100 * 21/25=100 * ?/100  ==> percent value is multiplying a decimal by 100

2100/25 = ? ==> solve for ?

? = 84%

Answer:

21 is 84% of 25

please mark brilliant

Answer:

It's going to take 32.7 years

The value of x is 69°.

What is a quadrilateral?

A closed quadrilateral has four sides, four vertices, and four angles. It is a form of polygon. In order to create it, four non-collinear points are joined.

Given that ABCD is a quadrilateral.

The diagonal AC divides the quadrilateral into 2 triangles △ABC and △ACD.

The length of sides AC and CB of the △ABC is same. Thus △ABC is isosceles triangle. Therefore ∠BAC = ∠ABC = x°.

Similarly, the length of sides AC and CD of the △ADC is same. Thus △ADC is isosceles triangle. Therefore ∠CAD = ∠CDA = 66°

Given that ∠DCB = 90°.

∠A = ∠CAD + ∠BAC = 66° + x°

The sum of all interior angle of a quadrilateral is 360°.

Therefore,

∠A + ∠B + ∠C + ∠D = 360°

66° + x° + x° + 90° + 66° = 360°

Add to the like terms:

222 + 2x = 360

Subtract 222 from both sides:

2x = 138

x = 69

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Answer:

Below

Step-by-step explanation:

The line has negative slope and y-axis intercept = 2  from inspection

 two points on the line are needed to calculate the slope

    find two easy to work-with points

          like   (-3,4)  and  (4,-1)

           slope = (y1-y2) / ( x1-x2)  = (4 - -1) / ( -3-4) =  -5/7

Slope intercept form   y = mx +b     m is slope   b is intercept of y-axis

                               soooo   ...   y = -5/7 x + 2

The graph is rather fuzzy:

I looked a little longer and decided points   (-4,5) and (4,-1) may be more accurate:

 slope =  5--1 / -4-4 =- 6/8      so then the answer would be  y = -3/4x + 2

The surface area of the composite figure is 1856.53cm²(nearest hundredth)

A composite shape can be defines as a shape created with two or more basic shapes. We often refer to composite shapes as compound and complex shapes.

The figure has two shapes; a cylinder and an hemisphere.

Therefore the total surface area of the composite figure = surface area of cylinder + surface area of hemisphere.

The surface area of cylinder= 2πr(r+h)

= 2× 3.14 × 5.5( 5.5+40)= 1571.57cm²

The surface area of hemisphere= 3πr²

= 3×3.14×5.5²

= 284.96cm²

Therefore the surface area of the composite figure is 1571.57cm² + 284.96cm²= 1856.53cm²(nearest hundredth)

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Factorization is the reverse process of expansion of mathematical expression to simple terms. The factorized term is: [tex]\frac{x + 14}{6}[/tex]

Factorization is a procedure in which a given number of terms of a mathematical expression is reduced by collecting common terms. It involves reducing a given mathematical expression to a simple form of terms.

Given that:

[tex]\frac{x^{2}+ 12x - 28}{6x^{2} }[/tex] ÷ [tex]\frac{x - 2 }{x^{2} }[/tex]

[tex]\frac{x^{2}+ 12x - 28}{6x^{2} }[/tex] x [tex]\frac{x^{2} }{x -2}[/tex]

[tex]\frac{x^{2} + 12x - 28}{6(x - 2)}[/tex]

Factorizing the numerator, we have;

[tex]x^{2} + 12x - 28[/tex] = (x - 2) (x + 14)

So that,

[tex]\frac{(x- 2) (x + 14)}{6(x - 2)}[/tex]

[tex]\frac{(x + 14)}{6}[/tex]

Thus the factorized form of the given question is [tex]\frac{1}{6}[/tex](x - 14).  

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Answer:

Step-by-step explanation:

4.2430

Answer:

H=5

Step-by-step explanation:

25=1/2h(2+8)

25=1/2h(10)

25=10*h/2

what is dividend by 2 equals 25?

50

what times 10 equals 50?

5

For the expression -34 < x < 10, interval notation, builder notation and graphical solution is shown below.

A number line is a line on which numbers are pointed at some intervals, it is used to show numerical operations.

The given expression is -34 < x < 10

The interval notation of the expression -34 < x < 10 is given as,

x ∈ (-34, 10)

The builder notation of the expression -34 < x < 10 can be given as,

{x |  -34 < x < 10}

The graphical solution of the expression -34 < x < 10 is given below.

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The value of x in the linear inequality 5/8x - 1 ≥ 9 is x ≥ 16

Linear inequalities are the expressions where any two values are compared by the inequality symbols such as, ‘<’, ‘>’, ‘≤’ or ‘≥’. These values could be numerical or algebraic or a combination of both.

An inequality represents the mathematical expression in which both sides are not equal. If the relationship makes the non-equal comparison between two expressions or two numbers, then it is known as inequality. In this case, the equal sign “=” in the expression is replaced by any of the inequality symbols such as greater than symbol (>), less than symbol (<), greater than or equal to symbol (≥), less than or equal to symbol (≤) or not equal to symbol (≠).

In the problem given;

5/8x - 1 ≥ 9

Solving for x in the inequality;

x ≥ 16 which can be represented using an interval notation as [16, ∞)

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Answer:

x≤−10

Step-by-step explanation:

x−(−11)≤1

Step 1: Simplify both sides of the inequality.

x+11≤1

Step 2: Subtract 11 from both sides.

x+11−11≤1−11

x≤−10

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1. Given

2. Alternate interior angles theorem

3. Given

4. Vertical angles

5. ASA

Yes, Gabby is correct. Lake city is warmer at 8F  than Ellenville.

Temperature is defined as the sum of the kinetic energies of all the atoms or molecules in a substance. The kinetic energy of a substance's constituent particles varies. A distribution can be used to depict the particles' kinetic energy at any particular moment.

Temperature is measured in Fahrenheit, Celsius and Kelvin.

As minus sign with the temperature depicts cold and hot and it have to do nothing with the calculation. The correct way is 14-6 = 8f. So Gabby is correct. We will not consider minus sign with six in calculations.

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By using the concept of function, it can be seen that the given graph represents a function.

What is a function?

A function from A to B is a rule that assigns to each element of A a unique element of B. A is called the domain of the function and B is called the codomain of the function.

There are different operations on functions like addition, subtraction, multiplication, division and composition of functions.

Here the values on the x axis represents the domain and the values on the y axis represents the Range.

From the graph it can be seen that

Every point of the domain maps to unique point on the range.

So this is a function

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The dates the survey was conducted are not crucial to the findings, so the researcher is not required to report them. It is "false" to say that.

This information is thorough data that was acquired from the a target audience regarding a particular subject to perform research.

Thus, it is "false" to say that the dates the survey was conducted are not crucial to the findings, so the researcher is not required to report them.

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The statement 5 less than three times a number x is expressed as an expression to 3x - 5

An algebraic expression can be described as an expression made up of coefficients, terms, factors, variables and constants.These expressions are also composed of some mathematical and arithmetic operations.

They include;

Addition

Division

Multiplication

Subtraction

Parentheses

Bracket, etc

From the information given, we have that; The number is x. The number is 5 times lesser than three times the value of xThis can be represented as; 3x - 5

Hence, the expression represented is 3x - 5

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If another freight train leaves an hour later from the same station and also heads east at 25 mph. The second freight train catches up with the first one by 11:12 pm.

Distance is a numerical representation of the distance between two items or locations. Distance refers to a physical length or an approximation based on other physics or common usage considerations.

The relative speed for the given condition is,

=25 mph - 20mph

=5 mph

Relative distance = relative speed × time

Relative distance = 5 mph × 1 hour

Relative distance = 5 miles

The time will the second freight train catch up with the first one is obtained as,

Distance = speed × time

5 miles = 25 mph × t

t = 5 / 25

t=0.2 hour

1 hour = 60 minute

0.2 hour = 60 × 0.2

0.2 hour = 12 minute

=10:00 + 60:00 +12:00

=11:12

Thus, if another freight train leaves an hour later from the same station and also heads east at 25 mph. The second freight train catches up with the first one by 11:12 pm.

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Answer:

[tex]\sf 0.19\overline{2} \quad Repea\:\!ting[/tex]

[tex]\sf 0.\overline{314} \quad Repea\:\!ting[/tex]

0.5353...   Repeating

0.7777  Non-repeating

Step-by-step explanation:

A repeating decimal is a decimal number with a digit (or group of digits) that repeats forever.

There are three ways to show a repeating decimal:

[tex]\sf 0.19\overline{2}[/tex]

This is a repeating decimal as the line over the "2" means that this digit repeats forever.

[tex]\sf 0.\overline{314}[/tex]

This is a repeating decimal as the line over the "314" means the group of digits 314 repeats forever, e.g. 0.314314314...

0.5353...

This is a repeating decimal as there are two duplicates of the repeating block of digits "53" followed by an ellipsis.

0.7777

This is non-repeating decimal as there are no dots or lines above any of the digits, nor an ellipsis after the repeating digits.

After solving the linear equation in two variables we get the value of x=13 and y =-24/5

What is linear equation in two variable?

If an equation is written in the form axe + by + c=0, where a, b, and c are real integers and the coefficients of x and y, i.e., a and b, respectively, are not equal to zero, then it is said to be a linear equation in two variables.

Examples of two-variable linear equations are 10x+4y = 3 and -x+5y = 2.

Such an equation has a pair of numbers as its solution, one for x and one for y, which further equalizes the two sides of the equation.

A system of linear equations in two variables can be solved using one of five techniques. These techniques are described below:

2x+5y=2 multiply this equation by 2

we get,

4x+10y=4

And the other equation is :-

5x+10y=17

Subtracting both the equation we get :-

4x+10y=4

5x+10y=17

-    -        -

________

-x =-13

x=13

y=2-26/5

y=-4.8 or -24/5

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The inequality represent the number of goals the team must score g ≥ 8.

An inequality show the relationship between two values in an algebraic equations that are probably not equal.

The statement about a game in which various teams are the playing:

It is given that To win that  game, the team must scores at least 8 goals.

The meaning of word at least is that , the team can score either 8 goals or more than the 8 goals.

So, we will write this situation in terms of the inequality as follows:

The value of g will be greater than or equal to 8.

= g ≥ 8.

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Answer:

The answer is 81.85%

Step-by-step explanation:

The z score is used to determine by how many standard deviations the raw score is above or below the mean.

The z score is given by:

z = x - μ/σ

where,

For x = 88

z = 88 - 116/14

z = (-2)

For x = 130

z = 130 - 116/14

z = (1)

Thus,

P(88 < x < 130) = P(-2 < z < 1)

= P(z < 1) - P(z < -2)

= 0.8413 - 0.0228 = 81.85%

Thus, 81.85% of the population would be between 88 and 130.

x = 36

Step-by-step explanation:

First find the difference of size for the two givens sides on figure A and figure B. On figure A we have the given side 45, and Figure B the given size 27. Subtract the two to get 18. So the difference of scale is 18 for the two figures. So in order to find x just add the 18 to the 18 in figure B, and you get 36.