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Cerrena [4.2K]
3 years ago
14

An adult blinks about 450 times in 30 minutes. A 12 year old blinks about 150 times in 15 minutes. How many more times does an a

dult blink in 60 minutes that a 12-year-old?
Mathematics
1 answer:
kaheart [24]3 years ago
5 0

Answer:

300

Step-by-step explanation:

An adult blinks

450 in 30 minutes

900 in 60 minutes (multiply 2 on both sidds)

A 12-year-old blinks

150 times in 15 minutes

600 times in 60 minutes (multiply 4 on both sides)

Difference:

900 - 600 = 300.

An adult blinks 300 more times.

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A delivery truck weighs 5.5 tons before it is loaded with packages. Once the delivery truck is full of x packages it weighs 6.1
KIM [24]

Answer:

80 packages

Step-by-step explanation:

0.0075*80= 0.6            5.5 + 0.6= 6.1

4 0
2 years ago
14. Solve the following equations.<br> (a), 7x + 8 = 10 + 3x
3241004551 [841]

answer: x = 1/2

<u>explanation</u>

subtract 3x from both sides

4x+8=10

subtract 8 from both sides

4x=2

divide both sides by 4

x=2/4

simplify

x=1/2 OR x=.5

hope i helped!

4 0
2 years ago
Read 2 more answers
An animal shelter has $2500 in its reserve fund. The shelter charges $40 per animal placement and would like to have at least $4
densk [106]

Answer:

Step 1

Write and solve the inequality:

2,500 + 40a ≥ 4,000, or 40a ≥ 1,500

a ≥ 37.5

Step 2

If the shelter places 30 cats and 10 dogs,

or 40 animals, that will be enough to meet

its goal, because a = 40 is a solution to the

inequality a ≥ 37.5.

5 0
3 years ago
Triangle ABC was transformed using the rule (x, y) →(-y,
CaHeK987 [17]

Answer:

A the first one ( the rotation of 90 degree)

Step-by-step explanation:

Please mark as brainliest if it helps. I need to rank up.

3 0
3 years ago
Read 2 more answers
Which sampling method is generally considered the weakest?
babunello [35]
Answer – C. (Convenience sampling)

The sampling method that is generally considered the weakest is convenience sampling. This is because in convenience sampling, there is usually no inclusion criteria identified prior to the selection of subjects. Convenience sampling involves getting participants wherever you can conveniently find them. Typically, the first available participants (or any other primary data source, as the case may be) will be used for the research without any additional requirements.Other names by which convenience sampling is known are: Incidental Sampling, Chunk Sampling, and Accidental Sampling.
8 0
3 years ago
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