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Inga [223]
3 years ago
7

Subtract 7x^2+4x-9 from 5x^2+10x-5. Express the answer in descending degree order

Mathematics
2 answers:
nata0808 [166]3 years ago
4 0
Hi there!

To subtract this, we can only subtract like terms. That means we only subtract 7x^2 and 5x^2, 4x and 10x, and -9 and -5. It might make more sense after the work below:

7x^2 - 5x^2 = 2x^2
4x - 10x = -6x
-9 - -5 = -4

So, the answer is 2x^2 - 6x - 4

Hope this helps!
Ugo [173]3 years ago
4 0

Answer:

2x^2 - 6x - 4

Step-by-step explanation:

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If (x, y) is a solution to the system of equations, what is the value of y? 1/4 x + 1/8 y = 2 1/3 x + 1/2 y = 4 A) 4 B) 6 C) -6
andre [41]
<h3>The value of y is 4</h3>

<em><u>Solution:</u></em>

<em><u>Given system of equations are:</u></em>

\frac{1}{4}x + \frac{1}{8}y =2 ---------- eqn\ 1\\\\\frac{1}{3}x + \frac{1}{2}y = 4 -------------- eqn\ 2

We have to find value of y

From eqn 1,

\frac{1}{4}x + \frac{1}{8}y =2 \\\\2x + y = 2 \times 8\\\\2x + y = 16 ---- eqn\ 3

From eqn 2,

\frac{1}{3}x + \frac{1}{2}y = 4\\\\2x + 3y = 4 \times 6\\\\2x + 3y = 24 ------ eqn\ 4

Subtract eqn 3 from eqn 4

2x + 3y = 24

2x + y = 16

( - ) -----------------

2y = 8

y = 4

Thus value of y is 4

5 0
3 years ago
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7 0
4 years ago
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KiRa [710]
−3(1+x)=−3x+1
Step 1: Simplify both sides of the equation.
−3(1+x)=−3x+1
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(Distribute)
−3+ −3x=−3x+1
−3x−3=−3x+1
Step 2: Add 3x to both sides.
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Step 3: Add 3 to both sides.
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Answer:
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5 0
3 years ago
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