Help This is a Test after I submit it I WONT BE ABLE TO CHANGE MY ANSWERS PLEASE make sure your answers are correct

Answer:

Step-by-step explanation:

Answer:

250 of 65% acid

100 gallons of 30% acid

Really sorry if this is incorrect, I had this question on my Lesson 16 test, and I don't know if it's correct or not...

Following are the calculation to the given question:

Assuming

x=The number of gallons of pure acid [tex](50\%)[/tex]

y = The number of liters of pure acid at [tex](80\%)[/tex] a concentration

[tex]\to x+y = 350[/tex]

The total quantity of gallons of each of the two types of pure acids............(1)

[tex]\to 0.65x+0.30y = 0.55(x+y)[/tex]

the mixture's acidity

[tex]\to 0.65x+0.30y = 0.55(350)\\\\\to 0.65x+0.30y = 192.5 ..........(2)[/tex]

So we have two equations and two variables to work with.

[tex]\to x+y = 350\\\\\to 0.65x+0.30y = 192[/tex]

multiply the first equation by [tex]0.30[/tex]

[tex]\to 0.30x+0.30y = 105\\\\\to 0.65x+0.30y = 192[/tex]

Subtract the second equation from the first

[tex]\to 0.35x = 87\\\\\to x = 248. 57 \approx 248 \ gallons\\\\ \to y = 350-248 = 102\ gallons\\\\[/tex]

As a result, we'll need 248 gallons of 65% pure acid and 102 gallons of 30% pure acid.

Learn more:

brainly.com/question/16352400

Answer:

It is the 3rd graph

Step-by-step explanation:

It is the only one that shows a porpotional relationship.

Answer:

sry mate.....

............

Answer: A closed, two-dimensional or flat figure

Step-by-step explanation:

Answer:

Different plane shapes have different attributes, such as the numbers of sides or corners. There are many kinds of plane shapes, but these are the most known squares, rectangles, circles, triangles, and octagons.

Step-by-step explanation:

Answer:

1/4

Step-by-step explanation:

The formula is y2-y1 over x2-x1.

(Remember that or another problem like that)

(3, 4) (-5,2)

x1 y1  x2 y2

We would do: 2-4 over -5-3

2-4=-2

-5-3=-8

Your answer would be: -2/-8, which is simplified to 1/4 because when you divide two negative numbers, you get a positive.

Answer:

O A = Bx H and A = L + L + W + W.

Step-by-step explanation:

Answer:

Step-by-step explanation:

i think its embryonic

Answer:

x=0.88

y= -3.7

Step-by-step explanation:

-3.7=6x-9

5.3=6x

0.88=x

Answer:

155

Step-by-step explanation:

( 25 x 4 ) + ( 3 x 15 ) + 10 = 155

Answer:

maybe 9

Step-by-step explanation:

Answer:

10.5 cm

Step-by-step explanation:

area of parallelogram = Bh

12 x 7 = AB x 8

AB = 12x7 / 8 = 21/2 = 10.5

Answer:

1 = 5

2 = 8

3 = 1

4 = 3

and

5 = 9

Step-by-step explanation:

[tex]\sqrt{}4^{3}[/tex]

Answer:

The radical form of the expression  is, 8

Answer:

The GCF is 2²

Step-by-step explanation:

The factored expression would be 2²(4x+3) .

Answer:

B

Step-by-step explanation:

5:7

5×2 = 10

7×2 = 14

10:14 = 5:7

Answer: The answer is D.

Step-by-step explanation: The bird decreases its heights by 12 feet which is what the question is asking.

Answer:

5%

Step-by-step explanation:

20/400

10/200

5/100

5%

Answer:

it is 6

Step-by-step explanation:

its a reverse diamond

Answer:

 y = 5x - 7

Step-by-step explanation:

(3 , 8) ; slope(m) = 5

Equation of the line: y - y₁ = m( x- x₁)

y - 8 = 5(x - 3)

y -8 = 5x - 5*3

y-8 = 5x - 15

   y = 5x - 15 +8

  y = 5x - 7

2x-7 = 11

7 goes to the other side

2x=11+7

2x = 18

x=18/2

x=9

7x + 1 = 22

1 goes to the other side

7x=22 - 1

7x=21

x=3

3x - 8 = 22

8 goes to the other side

3x = 22+8

3x=30

x=10

8x+5 = 45

5 goes to the other side

8x=40

x=40/8

x=5

Answer:

one fifth

Step-by-step explanation:

kso3o3orkckcncmdkdodp9d

Answer:

4/35

Step-by-step explanation:

4   *   1    = 4

7   *   5    = 35

well that took alot of guesses...

Given:

The graph of an exponential function.

To find:

The function in the form of [tex]f(x)=ab^x[/tex].

Solution:

The general form of an exponential function is

[tex]f(x)=ab^x[/tex]                ...(i)

From the given graph it is clear that the function passes through the points (0,4) and (1,7). It means these points will satisfy the function.

For x=0 and f(x)=4,

[tex]4=ab^0[/tex]

[tex]4=a(1)[/tex]

[tex]4=a[/tex]

For x=1 and f(x)=7,

[tex]7=ab^1[/tex]

Putting a=4, we get

[tex]7=4(b)[/tex]

[tex]\dfrac{7}{4}=b[/tex]

Substitute a=4 and [tex]b=\dfrac{7}{4}[/tex] in (i).

[tex]f(x)=4\left(\dfrac{7}{4}\right)^x[/tex]

Therefore, the required exponential function is [tex]f(x)=4\left(\dfrac{7}{4}\right)^x[/tex].

Answer:

Length = 15

Width = 6

Area = 90

Step-by-step explanation:

Area of the rectangle = [tex] {x}^{2} + 3x - 6x - 18[/tex]

Lets factorise the polynomial

[tex] = > x(x + 3) - 6(x + 3)[/tex]

[tex] = > (x + 3)(x - 6)[/tex]

We know that Area = Length × Width

Let the length be (x + 3) & width be (x - 6)

Its given in the question that x = 12. So putting the value of x gives ,

Length = [tex]x + 3 = 12 + 3 = 15[/tex]

Width = [tex]x - 6 = 12 - 6 = 6[/tex]

Area = Length × Width = 15 × 6 = 90

Answer:

2^3x7

your welcome

Answer:

23× 7

Step-by-step explanation:

have a wonderful day!!! :) :)

Answer:

50.2 cm^2

Step-by-step explanation:

Formula for the area of a circle: [tex]\pi r^{2}[/tex]

Radius of bigger circle = 5

Area of big circle = 25 * 3.14 = 78.5

Radius of smaller circle = 3

Area of small circle = 9 * 3.14 = 28.26

Now, we subtract:

78.5 - 28.26 = 50.24 <--- Because we have to round to the nearest tenth, the final answer is 50.2

Answer:

50.2 cm²

Step-by-step explanation:

Find the area of both circles and subtract them.