# GMAT Algebra (NO CALC)

posted by .

It's been a few years since I've done algebra, and many more since we've been expected to do it without a calculator like the GMAT rules state. Please help me figure out these two problems without the use of a calculator.
1.
__________________
√(16)(20) + (8)(32) = The answer is -4

2.
1
---------
0.75 - 1

• GMAT Algebra (NO CALC) -

1.
__________________
√(16)(20) + (8)(32)
=√(64*5+64*4)
=√(64*(5+4))
=8√(9)
=8*3
=24

2.
1
---------
0.75 - 1
=1/(0.75-1)
=1/(-0.25)
=-1/(1/4)
=-4/1
=-4

• GMAT Algebra (NO CALC) -

Thank you, my mistake on mixing up the answers when typing. I get number two now. But on number one, how do you get to
=√(64*5+64*4)

and then do you combine 64s for
=√(64*(5+4))

thank you so much

• GMAT Algebra (NO CALC) -

I break down 16*20 into its prime factors, or 64*5 to find if the other term has similar factors.
I did find a common factor of 64 by changing 8*32 to 4*64.
The rest you know.

## Similar Questions

1. ### algebra

need help with 2 questions first It has been a long time since I did algebra and don't rememeber how to work the problems 1/5(x+1) + 2/5(x-1) = 3/10 2nd problem 0.1(2x-1) + 0.02(4x + 4) = 0.05x
2. ### algebra

it has been found that the world record for the men's 10,000 meter run has been decreasing steadily since 1950. the record is approximately 28.7 minutes minus 0.05 times the number of years since 1950. assume the record continues to …

4. ### statistics

GMAT and GPA Scores for 12 MBA Students Compute the covariance and the determination and interpret your findings. GMAT- 599 689 584 631 594 643 MBA GPA- 9.6 8.8 7.4 10.0 7.8 9.2 GMAT- 656 594 710 611 593 683 MBA GPA- 9.6 8.4 11.2 7.6 …
5. ### Statistic

GMAT and GPA Scores for 12 MBA Students Compute the covariance and the determination and interpret your findings. GMAT- 599 689 584 631 594 643 MBA GPA- 9.6 8.8 7.4 10.0 7.8 9.2 GMAT- 656 594 710 611 593 683 MBA GPA- 9.6 8.4 11.2 7.6 …
6. ### English

Could you please check these sentences? 1) I haven’t been here for long. How long have you been married?
7. ### English

I left out the following sentences. Thank you very much, Writeacher. 1) This is the first time I’ve flown in an aeroplane. The child slept from eight till eight without waking one. I’ve known Mary since last month. 2) We sent John …
8. ### stats.

The GMAT test is required for admission to most graduate programs in business. In a recent year, the GMAT test scores were normally distributed with a mean of 550 and standard deviation of 100. A. Find the first quartile for the distribution …
9. ### statistics

Suppose that the average score on the GMAT exam is 500 and that the standard deviation of all scores is 100 points. You would expect approximately 95% of all GMAT scores to be between
10. ### Stats

A random sample of 100 GMAT scores has a mean of 500. Assume that GMAT scores have a population standard deviation of 120. Construct a 95% confidence interval estimate of the mean GMAT scores. (15 pts) What is the sample size for the …

More Similar Questions