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Effectus [21]
3 years ago
11

The product of 5 and a numberis -80

Mathematics
1 answer:
ad-work [718]3 years ago
4 0
1. 5x= -80. x= -16

2. x - 73 = 129. x = 202

3. x/-8 = 22. x = -176

4. 2x + 8 = 8. 2x = 0. x = 0

5. 3x - 7 = 40. 3x = 47. x = 47/3
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Mary had $25,000 to invest. She invested part of that amount at 3% annual interest and part at 5% annual interest for one year.
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(25000-f)(.03)+.05f=1100

750-.03f+.05f=1100

750+.02f=1100

.02f=350

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So Mary invested $17500 @ 5% and 7500 at 3% to earn $1100 in interest.


3 0
3 years ago
Which is composite number?
Westkost [7]

Answer:

A whole number that can be made by multiplying other whole numbers.

Example: 18 can be made by 3 × 6 so is a composite number.

16 can be made by 4 x 4 so it is a square root and a composite number

14 can be made by 2 x 7 so is is a composite number.

It is not a prime number as all Composite Number have factors other than 1 and itself). The first few composite numbers (sometimes called "composites" for short) are 4, 6, 8, 9, 10, 12, 14, 15, 16,

3 0
3 years ago
Read 2 more answers
A little girl kicks a soccer ball. It goes 10 feet and comes back to her. How is this possible?
Elanso [62]

She is standing in front of a wall which is 10 feet away when she kicks the ball and it hits the wall and comes back to her by the virtue of Newton's third Law of motion! She kicks the ball into the air vertically above her and the ball rises to 10 feet and then comes back to her by the virtue of gravity!

8 0
2 years ago
A bus driver started her day with an empty bus. At her first stop she picked up
lidiya [134]

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12 people.

Step-by-step explanation:

Let's do this one at a time.

First stop:

0 + 11 = 11

Second stop:

11 + 5 = 16.

16 - 7 = 9.

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9 + 5 = 14.

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2 years ago
Given the following exponential function, identify whether the change represents
Pavel [41]

Answer:

3%

Step-by-step explanation:

This equation represents exponential decay. Whenever the base is less than 1, the function represents decay. When the base is greater than 1, the function represents growth. In this case, the base is .97 which is less than 1, representing decay.

The formula for exponential decay is y=a(1-r)x.

r is the decay rate, expressed as a decimal.

In this case, r = .03 which represents 3%!

7 0
2 years ago
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