4 years ago

An expression that represents the sum of B and 5 times 2

1 answer:

5 0

2(b+5)

Since "sum" means the answer to and addition problem it means we have to add. So it would be b+5. And instead of writing 2 x b+5. There is a simpler way: 2(b+5) cuz it means the same thing (multiplying by two) Hope this helps! Good luck!

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Please help!! Write in simplest radical form: √7/8 Show how you figured it out

12345 [234]

Given expression: $\sqrt{\frac{7}{8}}$ .

$\mathrm{Apply\:radical\:rule\:}\sqrt[n]{\frac{a}{b}}=\frac{\sqrt[n]{a}}{\sqrt[n]{b}}$

$=\frac{\sqrt{7}}{\sqrt{8}}$

$\sqrt{8}=\sqrt{2^2\cdot \:2}=2\sqrt{2}$

$\frac{\sqrt{7}}{\sqrt{8}} =\frac{\sqrt{7}}{2\sqrt{2}}$

$\mathrm{Rationalize\:}\frac{\sqrt{7}}{2\sqrt{2}}$

$\mathrm{Multiply\:by\:the\:conjugate}\:\frac{\sqrt{2}}{\sqrt{2}}$

$=\frac{\sqrt{7}\sqrt{2}}{2\sqrt{2}\sqrt{2}}$

$=\frac{\sqrt{14}}{4}$

$=\frac{\sqrt{14}}{4}$ .

3 0

4 years ago

Using a calculator to increase 355 by 12% equals ??(. )

Natasha2012 [34]

Answer:

$355 + \frac{12}{100 } \times 355 \\ = 397.6$

4 0

2 years ago

Read 2 more answers

Justine answered 68 questions correctly on a 80-question test.

cestrela7 [59]

For A the answer is 85% correct. Then 15% incorrect. I got the number correct by taking 68 and dividing by 80. To get the number incorrect I took the 15 other questions (80-68) and did 12 divided by 80 to get the 15% incorrect.

5 0

4 years ago

This one too! Thank you so much

denis23 [38]

$2(l+w)=P\ \ \ \ |:2\\\\l+w=\dfrac{P}{2}\ \ \ \ \ |-l\\\\\boxed{w=\dfrac{P}{2}-l}$