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bija089 [108]
3 years ago
5

Which expression are equivalent

Mathematics
1 answer:
Jet001 [13]3 years ago
4 0

Answer:

OPTION A and D

-80x+28y -56

4(-20x+7y-14)

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A flea weighs 8 decigrams, and an ant weighs 3 milligrams. How much more does a flea weigh than an ant?
Flauer [41]
1 decigram is 100 milligrams so the flea weighs 800 milligrams and 800-3=797 so the flea weighs 727 milligrams more than the ant
8 0
4 years ago
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For a random sample of 50 measurements on the breaking strength of cotton threads, the mean breaking strength was found to be 21
Vikentia [17]

Answer:

205.81 to 214.19

Step-by-step explanation:

Sample size (n) = 50

Sample mean weight (X) = 210 grams

Sample standard deviation (s) = 18 grams

Confidence coefficient (Z) at 90% = 1.645

The confidence interval for the true mean breaking strength of cotton threads of this type, at a 90% confidence level, is given by:

CI=X \pm Z*\frac{s}{\sqrt n}\\CI=210 \pm 1.645*\frac{18}{\sqrt 50}\\CI = 210 \pm 4.19\\CI =205.81\ to\ 214.19

The confidence interval is 205.81 grams to 214.19 grams.

6 0
4 years ago
NEED THESE ANSWERS FAST
vladimir2022 [97]

Answer:

1) m=2/9; y-intercept= 17/3

2) m=7 ; y-intercept= 22

3) m= -2/11 ; y-intercept= 100/11

4) m= 13/19 ; y-intercept= -53/13

Step by Step Explanation:

Use the slope formula to find the slope m.

6 0
3 years ago
53 out of 100 erasers are blue. What percent of the erasers are blue?
Lilit [14]
53/100 erasers are blue

53/100 = 0.53

0.53 = 53%

53% is your answer

hope this helps
7 0
4 years ago
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How much water and how much drink mix should Jerome use to make enough energy drink for all the runners? Create a table to show
yanalaym [24]

Answer: First, you need to figure out 22 times 2 = 44. Then, you need to multiply the original ratio by 44 to get the answer.

Step-by-step explanation:

3 0
3 years ago
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