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3 years ago

1/2x plus 12 = 8x Please help me!

Mathematics

1 answer:

netineya [11]3 years ago

6 0

Answer:

8/5=x

Step-by-step explanation:

1/2x+12=8x

Subtract 1/2x from both sides

12=15/2x

Multiply 2/15 on both sides

8/5=x

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When 31 times a number is increased by 40, the answer is the same as when 200 is decreased by the number. Find the number.

natulia [17]

Answer:

The Answer is: 5.

Step-by-step explanation:

Let n = number.

The number times 31 plus 40 is equal to 200 minus the number:

31n + 40 = 200 - n

32n = 200 - 40

32n = 160

n = 5

Proof:

31(5) + 40 = 200 - 5

155 + 40 = 195

195 = 195

Hope this helps! Have an Awesome Day!! :-)

5 0

3 years ago

When ms. shreve solved an equation in class, she checked her solution and found that it did not make the equation true! Examine

Alex777 [14]

The first part of the second line, she left the -5 there. The correct work and solution should be this:
5(2x-1)-3x=5x+9
7x−5=5x+9
2x-5=9
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6 0

4 years ago

| -11 - (-8) | = Please simplify and show work

Karolina [17]

Answer:

-3 should be your answer

Step-by-step explanation:

hope that helped :D

3 0

3 years ago

Simplify square root of 3 multiplied by the fifth root of 3.

almond37 [142]

$\bf a^{\frac{{ n}}{{ m}}} \implies \sqrt[{ m}]{a^{ n}} \qquad \qquad
\sqrt[{ m}]{a^{ n}}\implies a^{\frac{{ n}}{{ m}}}
\\\quad \\% rational negative exponent
a^{-\frac{{ n}}{{ m}}} =
 \cfrac{1}{a^{\frac{{ n}}{{ m}}}} \implies \cfrac{1}{\sqrt[{ m}]{a^{ n}}}\qquad\qquad % radical denominator
\cfrac{1}{\sqrt[{ m}]{a^{ n}}}= \cfrac{1}{a^{\frac{{ n}}{{ m}}}}\implies a^{-\frac{{ n}}{{ m}}} \\\\
$

$\bf -----------------------------\\\\
thus\qquad \sqrt{3}\cdot \sqrt[5]{3}\implies \sqrt[2]{3^1}\cdot \sqrt[5]{3^1}\implies 3^{\frac{1}{2}}\cdot 3^{\frac{1}{5}}
\\\\\\
3^{\frac{1}{2}+\frac{1}{5}}\implies 3^{\frac{7}{10}}\implies \sqrt[10]{3^7}\implies \sqrt[10]{2187}$

5 0

3 years ago

Ms. Anderson deposits $7,000 into a savings account that pays a simple interest of 2% per year. What is the total amount of mone

Reika [66]

Answer:

$7420

Step-by-step explanation:

First, converting R percent to r a decimal

r = R/100 = 2%/100 = 0.02 per year,

then, solving our equation

I = 7000 × 0.02 × 3 = 420

I = $ 420.00

The simple interest accumulated

on a principal of $ 7,000.00

at a rate of 2% per year

for 3 years is $ 420.00.

5 0

3 years ago