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3 years ago

10

Which equation shows the first step of the substitution method being used to solve the system of linear equations? x + y = 6 x =

y + 5

1 answer:

pychu [463]3 years ago

3 0

Second one. Not enough English knowledge to explain sorry.

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A: 5x − 2y = 10

Nuetrik [128]

Answer:

D) Multiply A by -4 and B by 5

Step-by-step explanation:

5x-2y=10

4x+3y=7

----------------

-4(5x-2y)=-4(10)

5(4x+3y)=5(7)

----------------------

-20x+8y=-40

20x+15y=35

---------------------

23y=-5

y=-5/23

5x-2(-5/23)=10

5x+10/23=10

5x=10-10/23

5x=230/23-10/23

5x=220/23

x=(220/23)/5

x=(220/23)(1/5)

x=220/115

x=44/23

7 0

4 years ago

Mashutka [201]

Use the pythagorean theorem if you cannot directly measure it. a squared plus b squared = c squared

5 0

3 years ago

A recipe that makes 8 jumbo blueberry muffins calls for 1 1/2 teaspoons of baking powder how much making baking powder is needed

nirvana33 [79]

we know that

For make $8$ jumbo blueberry muffins is needed $1\frac{1}{2}$ teaspoons of baking powder

$1\frac{1}{2}=1.5$

So

by proportion

$\frac{8}{1.5} =\frac{36}{x} \\ \\ 8x=36*1.5\\ \\ x=\frac{36*1.5}{8} \\ \\ x=6.75$

$x=6\frac{3}{4}$ teaspoons of baking powder

therefore

the answer is

$6\frac{3}{4}$ teaspoons of baking powder

7 0

4 years ago

Read 2 more answers

Help me please with tenmarks

Tcecarenko [31]

I cant see attachment! What does it say?

8 0

4 years ago

Function that has <br> Domain: x≠-1<br> Range: y≠2

Degger [83]

I don't understand your question.

4 0

3 years ago