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lions [1.4K]
3 years ago
10

Can you help me solve the system by substitution

Mathematics
1 answer:
Semenov [28]3 years ago
8 0

Answer:

The answer is (-36,6)

Step-by-step explanation:

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

You might be interested in
Look at this system of equations.<br> 2x +5 =9.5<br> 3x + 5y =10.5<br> What is the value of x+y
stiv31 [10]

Answer:

x = 2.25 y = 0.75

Step-by-step explanation:

2x = 9.5- 5

2x = 4.5

x = 4.5 ÷ 2

x = 2.25

know we now what is x so in the second one we evaluate x

3(2.25) + 5y = 10.5

6.75 + 5y = 10.5

5y = 10.5- 6.75

5y = 3.75

y = 3.75 ÷ 5

y = 0.75

that's it !

if you want to check your answer you can evaluate x and y so it will be like

2×2.25 + 5

= 4.5 + 5 = 9.5

and

3× 2.25 +5×0.75

= 6.75 + 3.75 = 10.5

6 0
3 years ago
Which set of measurements can represent the lengths of a triangle's sides? Classify each set of lengths as a Triangle or Not a t
Alexxx [7]
Answer:

1. Not a triangle
2. Not a triangle
3. Triangle
4. Triangle
6 0
3 years ago
Write a situation in which positive and negative numbers are used to describe values that have opposite meaning. What does 0 rep
Ivahew [28]

Answer:

Explained below.

Step-by-step explanation:

There are quite a few examples of this but I will go with what is common in physics which is "acceleration due to gravity".

Acceleration due to gravity is positive when an object is falling down in the direction of gravity but negative when it is thrown upwards and acting against gravity motion.

Thus;

g_downwards = 9.8 m/s²

g_upwards = -9.8 m/s²

If acceleration due to gravity is zero, it means that the object is at the centre of the earth because at that point g = 0.

8 0
3 years ago
R=5(CA−0.3) solve for c
Maurinko [17]
R = 5(CA - 0.3)

<span>Multiply everything in the parenthesis by 5.</span>

R = 5CA - 1.5

Add 1.5 to both sides

1.5 + R = 5CA

Divide 5A on both sides.

C = 1.5 + R / 5A

Hope this helps!

4 0
3 years ago
Read 2 more answers
CAN YALL pLZ HELP ME
Mamont248 [21]
The answer is B because facts
3 0
3 years ago
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