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3 years ago

PLZ HELP ME with number 27

Mathematics

1 answer:

iris [78.8K]3 years ago

5 0

X^2 + x^2 =32
2x^2=32
x^2=16
x=4

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I don't know how to solve it . I don't know how to step it up

astraxan [27]

(-1,2) solve for the first variable in one of the equations, then substitute the result into the other equation

7 0

3 years ago

Is -3x+4y=8 parallel or perpendicular to -4x+3y=-6

meriva

Step-by-step explanation:

4y = 3x +8

y= 3/4x +2

3y = 4x -6

y = 4/3x -2

neither, perpendicular is negative reciprocal, and parallel m is the same. 3/4 =\ 4/3 and they are not negative reciprocals.

3 0

3 years ago

Can someone help me out with this problem

Klio2033 [76]

Answer:

Step-by-step explanation:

8 0

3 years ago

What is the answer to-10+(-10)

Kryger [21]

Hey!

When 2 negative numbers are added together, the answer is negative. Add the 2 numbers, and make sure your answer is negative.

$10 + 10 = 20$

Remember that the answer is negative. Add the negative sign. Now it becomes:

$20 \rightarrow -20$

<em>That means your answer is -20</em>

$\framebox{-20}$

6 0

3 years ago

Read 2 more answers

In 2010 a man mailed a $400 check to another man to repay a $400 debt of his great great grandfather who died in 1849. A bank es

laiz [17]

Answer:

9.41%

Step-by-step explanation:

Data provided in the question:

Present value of the debt = $400

Interest = $454 million = $454,000,000

Time, n = 155 years

Now,

Future value = Present value of the debt + Interest

Future value = $400 + $454,000,000

Future value = $454,000,400

Also,

Using the compounding formula,

Future value = Present value × ( 1 + r )ⁿ

here,

r is the interest rate

Thus,

$454,000,400 = $400 × ( 1 + r )¹⁵⁵

( 1 + r )¹⁵⁵ = $454,000,400 ÷ $400

( 1 + r )¹⁵⁵ = 1,135,001

1 + r = 1.0941

r = 1.0941 - 1

r = 0.0941

r = 0.0941 × 100% = 9.41%

4 0

4 years ago