4 years ago

Use the substitution method Y=-2x+11 y=-3x+21

Mathematics

1 answer:

gogolik [260]4 years ago

6 0

Solve for the first variable in one of the equations, then substitute the result into the other equation.

Y = 2 y /3 − 3

x = − y /3 + 7

Hope this helped!

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Solve the system of equations 4x+5y=-1 and -5x-8y=10 by combining the equations.

Nimfa-mama [501]

The solution of the equation are as follows:

x = 6 and y = -5

<h3 />

<h3>How to solve the system of equation?</h3>

4x + 5y = -1

-5x - 8y = 10

Therefore,

20x + 25y = -5

-20x - 32y = 40

-7y = 35

y = -5

Hence,

4x + 5(-5) = -1

4x - 25 = -1

4x = -1 + 25

4x = 24

x = 24 / 4

x = 6

learn more on equation here:brainly.com/question/14383993

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6 0

2 years ago

B. What is the number that is halfway between the two values?<br> 7 and 11<br> Submit

Nuetrik [128]

Answer:

Step-by-step explanation:

It would be 9 because 7 +2 is 9 and 11 - 2 is 9.

Isn't way to hard.

Good luck on whatever you are doing.

8 0

3 years ago

Read 2 more answers

PLease help! I'll mark you brainliest!

liraira [26]

Answer:

b. ${x}^{2} - 7x - 18$

Step-by-step explanation:

Area of shaded region

$= (2x + 4)(x - 5) - (x + 2)(x - 1) \\ \\ = 2 {x}^{2} - 10x + 4x - 20 \\ - {x}^{2} + + x - 2x + 2 \\ \\ = {x}^{2} - 7x - 18$

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3 years ago

Michelle deposited $3,400 into an account. she made no additional withdrawals or deposits. michelle earned 1.95% annual simple i

Talja [164]

$~~~~~~ \textit{Simple Interest Earned Amount} \\\\ A=P(1+rt)\qquad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill & \$3400\\ r=rate\to 1.95\%\to \frac{1.95}{100}\dotfill &0.0195\\ t=years\dotfill &2.5 \end{cases} \\\\\\ A=3400[1+(0.0195)(2.5)]\implies A=3400(1.04875)\implies A=3565.75$

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2 years ago

Verbal expression of y over 4 minus 7

skad [1K]

Y/4 - 7 = y is 28.

So basically y = 28.

8 0

3 years ago