MATHEMATICS MIDDLE SCHOOL

A roller coaster car rapidly picks up speed as it rolls doen a slope. As it starts down the slope, it's speed is 4m/s. But 3 seconds later, at the bottom of the slope, it's speed is 22m/s. What is its average acceleration?

Answers

Answer 1
Answer:

The average is 18m/s.

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Alexa worked 30 hours last week and earned $450. her pay has now been increased by 20% which equation describes her new rate of pay P, baesed on the numbe rof hourse, h, worked

Answers

Answer:

D.

Step-by-step explanation:
The answer would be d also can I get BRAINLIEST or something I need it

The dragonfly is the fastest flying insect it can move at a speed of about 50 feet per second find the approximate time for a dragonfly to travel 400ft

Answers

Answer:

8 seconds

Step-by-step explanation:

400 divided by 50 is 8

Answer: 8 sec

Step-by-step explanation

50 = 1sec

50 + 50 = 100

50 + 50 + 50 + 50 = 200

You keep adding 50 until you reach 400

Every 50 you add is 1 sec so if you add eight 50’s it would be 400 and that would mean it takes him 8 seconds to travel 400ft

3. A postcard has an area of 24 square inches. Two enlargementsof the postcard have areas of 54 square inches and 96 square inches. In each postcard, the length is 1 1/2 times the width.Which of the following could be the dimensions of the postcardor one of the enlargements? Mark all that apply.A) 6 inches by 9 inchesD)6 inches by 12 inchesB)10 inches by 15 inches E) 4 inches by 6 inchesC)8 inches by 12 inches

Answers

It is e because first look at all the choses 15 inches is the best so.....

9 is 12 percent of what number? ( show your work)

Answers

For this question, we want to find out what 9 / 12 equals as a percentor x / 100. Therefore, we have a proportion here and can say:9/12 = x/100Now, at this point, we can cross multiply to get:900 = 12xNow, divide both sides by 12 to get x alone and find that:x = 75 <==== FINAL ANSWER
so 9 is 12% of 75!
I hope that helps you out! Please let me know if you have any other questions!

Will reward brainliest

Answers

The answer is C because 10/x = tan20° and then just rearrange it so that x = 10/tan20°

Answer for 100 POINTS! Marking every correct answer brainiest. Use the picture below.

Answers

Answer:

0, 1, 4, 5, 6, and 9 can be the last digits of the squares of natural numbers.

Step-by-step explanation:

When looking at a list of the perfect squares, the last digits continuously follow this pattern: 1, 4, 9, 6, 5, 6, 9, 4, 1, 0. After this it repeats. This means that these are the only numbers that can be the last digits. When you take out the repeated numbers you get: 1, 4, 5, 6, 9, 0 which when written in order is:

0, 1, 4, 5, 6, and 9
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