Lesson 4-1 Solving Systems of Equations by Graphing

Answer:

read explanation

Step-by-step explanation:

rearrange equations to form y=mx+b

-2x+4=2y

-x+2=y

-y=-2x-5

y=2x+5

use these equations to find slope and y intercepts, and match those with the right graph

slope of first: -1

slope of second: 2

y-int of first: 2

y-int of second:5

The required equation model is n + d = 30 which represents a jar containing n nickels and d dimes worth a total of $30. which is the correct answer would be an option (D).

A numerical expression is algebraic information stated in the form of numbers and variables that are unknown. Information can is used to generate numerical expressions.

We have been given that a jar contains n nickels and d dimes worth a total of $30.

To determine the equation model that represents the given information.

As per the given information, the algebraic form is:

quantity of nickels + quantity of dimes = total worth

n + d = 30

Thus, the required equation model is n + d = 30 which represents a jar containing n nickels and d dimes worth a total of $30.

Hence, the correct answer would be option (D).

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Answer:

It takes the word processor 117 minutes to word process and spell check 27 pages.

Step-by-step explanation:

With the information provided, you can use a rule of three to find how long it would take to word process and spell check 27 pages given that it takes 26 minutes to word process and spell check 6 pages:

6 pages   →  26 minutes

27 pages  →          x

x=(27*26)/6=117 minutes

According to this, the answer is that it takes the word processor 117 minutes to word process and spell check 27 pages.

Answer:

Eight and one hundred thirty-four thousandths

Step-by-step explanation:

Thats how u write it in word form! i hope this helped :)

The required word form of the measure 8.431  centimeters wide is eight and one hundred thirty-four thousandths centimeters wide.

Unit of measurement is defined as every entity having its measures in dimensions, weight, and time. Such as for length we have a meter, for liquid we have liters, and so on.

Here,
The required number is 8.431, which can be written in word form as,
8.431 = Eight and one hundred thirty-four thousandths centimeters wide

Thus, the required word form of the measure 8.431  centimeters wide is eight and one hundred thirty-four thousandths centimeters wide.

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Answer:

I think A is the right answer

Answer:

The answer is A simple must be a group of people who are the target of the survey question

Step-by-step explanation:

Answer:

|1|, |-2|, |7|, |12|.

Step-by-step explanation:

I'm assuming this is absolute value.

Answer:

B) 54.00

Step-by-step explanation:

Answer:

y = 3 + 1/2 * x

Step-by-step explanation:

Answer:

X-Intercepts of the function.

Step-by-step explanation:

You'll do well to remember that. Good luck! I hate math!

Answer:

x intercept

Step-by-step explanation:

Answer:

A would be the answer

Step-by-step explanation:

8 is the x coordinate and 6 is the Y coordinate

Answer:

The answer is A

Step-by-step explanation:

The point is exactly on 8 and 6, x comes first

Answer:

6k=42

Either one ill still answer the equation

Step-by-step explanation:

Let K = Kris

42=6k

Answer:

all real numbers greater than or equal to 2

which is [2, infinite)

Answer:

Ok, this is pretty simple. So, if it rises 6 degrees every five days, then we have to figure out how many "five days" are in 30 days. It would be 6! So now all we have to do is multiply. 6 times 6 equals 36 degrees.

The answer is 36 degrees.

Step-by-step explanation:

Answer:

36

Step-by-step explanation:

If it rises 6 degrees every 5 days, we just need to figure out how many 5 days are in 30 days. When you solve, you'll get 6. Now we can just multiply 6 x 6 = 36. Hope this helped, please mark brainliest if it did

Answer:

The answer is below

Step-by-step explanation:

From the image:

∠P + ∠Q = 180° (consecutive angles are supplementary)

78 + ∠Q = 180

∠Q = 180 - 78

∠Q = 102°

∠RQN = 360° - 305° =(sum of angle in a point)

∠RQN = 55°

∠RQN + ∠RQP = 102°

∠RQP = 102 - 55 = 47°

a) Let PR = x

Using cosine rule:

[tex]x^2=600^2+950^2-2(900)(600)cos(47)\\\\x^2=485021.9\\\\x=\sqrt{485021.9} \\\\x=696 \ m[/tex]

Therefore PR = 696 m

b) Let ∠RPQ be A°

Using sine rule:

[tex]\frac{sin(A)}{600} =\frac{sin(47)}{696} \\\\sin(A)=\frac{sin(47)}{696} *600\\\\sin(A)=0.6304\\\\A=sin^{-1}(0.6304)\\\\A=39^0[/tex]

∠RPQ = 39°

Hence the bearing of R from P = ∠NPR = 78° - 39° = 39°

Answer: t= 11.5

Step-by-step explanation: 5 + (-11.5+3) = 3.5

Answer:

T = -3.7

Step-by-step explanation:

We begin with the given equation.

5(t+3)=-3.5

Distribute 5 throughout parentheses.

5t + 15 = -3.5

Move 15 to the other side and switch signs.

5t = -3.5 - 15

Combine like terms.

5t = -18.5

Divide by 5t.

t = -3.7

Answer: 40

Step-by-step explanation:

Find the reciprocal of the divisor

1/6: 6/1

Multiple it with the dividend

20/3 divided by 1/6= 20/3 x 6/1

20x6 = 120

3x1 = 3

Reduce the fraction: 40/1

Answer: 63 nurses and 14 doctors

so you know the ratio is 9:2. that means for every 9 nurses there are 2 doctors. i didn't make an equation but i counted it.

if theres 9 (9*1) nurses theres 2 (2*1) doctors

if theres 18 (9*2) nurses theres 4 (2*2) doctors

if theres 27 (9*3) nurses theres 6 (2*3) doctors

you get the point so i multiplied 7 to 9 and 7 to 2, which means:

if theres 63 (9*7) nurses theres 14 (2*7) doctors

i hope this helps :)

Answer:

1.11

Step-by-step explanation:

5.24+10.65=15.89

17-15.89= 1.11

good luck

Answer:

1.11

Step-by-step explanation:

hope this helped you! :)

Answer:

3. 150%    4. 8.3%

Step-by-step explanation:

Percent error formula is the difference between the actual and estimated divided by actual  times 100.

3.   (5-2) / 2   x  100= 150%

4.  (24-22)/  24  x 100 = 8.3%

Answer:

Hope this helps better

Answer; y < x-1

Step-by-step explanation:

Answer:

blue

Step-by-step explanation:

Answer:

Husfivhuisfhvkusdhvkufadhvkudshfukdahf

Step-by-step explanation:

Answer: 8 feet

Step-by-step explanation:

Answer:

30

Step-by-step explanation: First take the fastest speed of the squirrel, and then you multiply it by the percentage (250%). You can this by moving on decimal point to the left from the zero (250% = 2.50). Then multply the speed of the squirrel by said percentage of the girrafe,

12 x 2.5 = 30

Step-by-step explanation:

For the quadratic equation to have 1 repeated real solution, the discriminant b² - 4ac must be zero.

=> (-z)² - 4(z - 5)(5) = 0

=> z² - 20(z - 5) = 0

=> z² - 20z + 100 = 0

=> (z - 10)² = 0

Therefore z = 10.

Answer:

3/10

Step-by-step explanation:

2/3 of 9= 6. So 2/3 of the 9/10=3/10

Answer: added

Step-by-step explanation: