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statuscvo [17]
3 years ago
12

10. What is the value of x in the solution to the system of equations?

Mathematics
1 answer:
RUDIKE [14]3 years ago
3 0

Solve for x in first equation:

x-2y=7

Add “2y” to both sides

x=2y+7

Put this in to second equation:

3(2y+7)+2y=21

Solve for y:

Distribute the 3 into the ()

6y+21+2y=21

Combine the like y terms

8y+21=21

Subtract 21 from both sides

8y=0

Divide by 8 on both sides

y=0

Put this into the first solved equation:

x=2(0)+7

Solve for x:

Multiple 2(0)

x=0+7

Add 0 and 7

x=7

So the value of x is positive 7.

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3 years ago
Find the value of c(5)<br>c(n)=10+2n​
Dahasolnce [82]

Answer:

c = 10/n + 2

Step-by-step explanation:

3 0
3 years ago
Help please explain.
Lubov Fominskaja [6]
25 + 100i is correct because -5 squared is 25 and the the square root of -100 is 100i or 10i in its simplest form.
4 0
3 years ago
At what rate per annum does the compound interest of Rs 576 becomes to Rs 153 in 2 years
ArbitrLikvidat [17]

Answer:

The value of rate per annum is R = 12.5 %

Step-by-step explanation:

Principal amount = 576

Interest = 153

Amount after 2 years = 576 + 153 = 729

We know that

A = P [1 + \frac{R}{100} ] ^{T}

Put all the values in above equation

729 = 576 [1 + \frac{R}{100} ]^{2}

\frac{27}{24} = 1 + \frac{R}{100}

R = 12.5 %

This is the value of rate per annum.

4 0
4 years ago
Use the Distance Formula to find the distance between (−3, 7) and (8, −6) , rounded to the nearest hundredth.
igomit [66]

Answer:

d= 17.03

Step-by-step explanation:

d=\sqrt{ (x_{2}-x_{1})+(y_{2}-y_{1})^{2}}\\\\d=\sqrt{(8--3)+(-6-7)^{2}}\\\\d=\sqrt{(11)+(-13)^{2}} \\\\d=\sqrt{121+169}\\\\d= \sqrt{290} \\\\d=17.03

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4 years ago
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