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lana [24]
3 years ago
15

Brian has reduced his cholesterol level by 20% by following a strict diet and regular exercise. If his original level was 220, w

hat is his cholesterol level now?

Mathematics
2 answers:
ollegr [7]3 years ago
8 0

Answer:

Option B is the answer.

Step-by-step explanation:

Actual cholesterol level of Brain was 220.

He reduced his cholesterol level by 20% By following a strict diet and regular exercise.

So we have to calculate current level of his cholesterol.

Since 20% of 220 = \frac{220*20}{100} = 44

So after reduction of 44 units cholesterol level will be 220 - 44 = 176

Option B 176 is the answer.

In-s [12.5K]3 years ago
3 0
220 x 20% (.20) = 44
220-44=176
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Jason is building a 1 : 180 scale model of a real castle. his model has a rectangular base that is 3 feet wide and 4 feet long.w
balu736 [363]
The area of the actual castle would be 388,800 sq. ft.

We would multiply each of the sides of the scale model both by 180 to find the side lengths of the actual castle.

So...
180 x 4 = 720
180 x 3 = 540

If Area is equal to Length Times Width, all thats left to do is to multiply the two sides together.

720 x 540 = 388,800

Hope this helped! :D
3 0
2 years ago
If abcd is dilated by a factor of 3, the coordinate of a would be?
Katyanochek1 [597]

Answer: (-9, -3)

Step-by-step explanation:

A = (-3, -1)

A' = (-3, -1)*3 = (-9, -3)

4 0
1 year ago
A bookstore marks up the price of a book by 25% of the cost from the publisher. Therefore, the
lesya692 [45]

Answer:

(A)

  • P(60) = 78.98
  • When the bookstore spends $60 on a textbook, the student pays $78.98

Step-by-step explanation:

Given:

P(x) = 1.053(x+0.25x)

P(60) = 1.053(60+0.25*60)

=1.053(60+15)

=1.053(75)

P(60)=$78.98

Since x is the cost from the publisher, when the bookstore spends $60 on a textbook, the student pays $78.98.

<u>The correct option is A.</u>

3 0
3 years ago
Solve by elimination:
Pie

Answer:

B (5, 13)

Step-by-step explanation:

9x + 4y = 97

9x + 6y = 123

To solve by elimination, we want to <em>eliminate</em> a variable. To do this, we must make one variable cancel out.

First, we can see that both equations have 9x. To cancel out x, we must make <em>one</em> of the 9x's <em>negative</em>. To do this, multiply <em>each term</em> in the equation by -1.

-1(9x + 6y = 123)

-9x - 6y = -123

This is one of your equations. Set it up with your other given equation.

9x + 4y = 97

-9x - 6y = -123

Imagine this is one equation. Since every term is negative, you will be subtracting each term.

9x + 4y = 97

-9x - 6y = -123

___________

0x -2y = -26

-2y = -26

To isolate y further, divide both sides by -2.

y = 13

Now, to find x, plug y back into one of the original equations.

9x + 4(13) = 97

Multiply.

9x + 52 = 97

Subtract.

9x = 45

Divide.

x = 5

Check your answer by plugging both variables into the equation you have not used yet.

-9(5) - 6(13) = -123

-45 - 78 = -123

-123 = -123

Your answer is correct!

(5, 13)

Hope this helps!

6 0
3 years ago
Could someone Help pleasee ??!
malfutka [58]

Answer:

sorry if im wrong

Step-by-step explanation:

no

no

yes

yes

8 0
2 years ago
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