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3 years ago

Pls help!!!!!!! Determine the lowest common denominator for each sum or difference.

Mathematics

1 answer:

Thepotemich [5.8K]3 years ago

8 0

Answer:

Common Denominator 10: 5-7/10 and 3/2-4/5

Common Denominator 12: -3/4 + (-2/3) and 7/6 + (-5/12)

Common Denominator 24: 1/8-5/3 and 13/24+7/12

Hopefully This Helps You :)

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During a drive to Arizona, for the first two hours Emily drove at 50 mph,

galina1969 [7]

Answer:

the EXACT answer is 29.16666667

Step-by-step explanation:

First you add 50, 60, and 65 and get 175

she is driving for 6 hours so you divide 175 by six to get the average

Then you get 29.16666667

6 0

3 years ago

Gail can use her 12% employee discount once a week. Last Sunday, she bought a $45 sweater at 1/3 off and used her discount on th

NNADVOKAT [17]

Statement 1 : Gail bought a $45 sweater at 1/3 off.

<u>Discount in Sweater Purchase:</u>

$\frac{1}{3} \; of \; 45 = \frac{1}{3} \times 45 \; = \;\frac{45}{3} =\$15$

Statement 2: Gail can use her 12% employee discount once a week and used her discount on the suit priced at $140.

Discount in Suit Purchase:

$12\% \; of \; 140 =\frac{12}{100} \times 140 = 0.12 \times 140 = \$16.8$

Conclusion:

<u>Discount in Suit Purchase ($16.8) is greater than Discount in Sweater Purchase ($15)</u>

8 0

3 years ago

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Please help: (picture)

Slav-nsk [51]

We need to solve the speed formula for d. To do so, let's start by moving the number of the left hand side:

$\frac{S}{356} = \sqrt{d}$

Square both sides to get rid of the square root:

$\frac{S^2}{126736} = d$

Now plug the known value of the speed to find the distance:

$d = \frac{140^2}{126736} = \frac{19600}{126736} \approx 0.15465$

So the closest answer is the last one: d=0.155km

3 0

3 years ago

A person recently read that 84% of cat owners are women. How large a sample should the researcher take if she wishes to be 90% c

Lana71 [14]

Answer:

405

Step-by-step explanation:

To find sample size, use the following equation, where n = sample size, za/2 = the critical value, p = probability of success, q = probability of failure, and E = margin of error.

$n=\frac{(z_{\frac{\alpha }{2} })^{2} *p*q }{E^2}$

The values that are given are p = 0.84 and E = 0.03.

You can solve for the critical value which is equal to the z-score of (1 - confidence level)/2. Use the calculator function of invNorm to find the z-score. The value will given with a negative sign, but you can ignore that.

(1 - 0.9) = 0.1/2 = 0.05

invNorm(0.05, 0, 1) = 1.645

You can also solve for q which is 1 - p. For this problem q = 1 - 0.84 = 0.16

Plug the values into the equation and solve for n.

$n =\frac{(1.645)^2*0.84*0.16}{(0.03)^2}\\n= 404.0997333$

Round up to the next number, giving you 405.

6 0

3 years ago

Helpppppppppppppppp

dybincka [34]

Answer:

when h(x) = 0, x = 7/3

Step-by-step explanation:

0 = 3x - 7

7 = 3x

7/3 = x

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3 years ago

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