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Mekhanik [1.2K]
3 years ago
12

NEED HELP ASAP

Mathematics
1 answer:
Ksenya-84 [330]3 years ago
5 0

Answer:

172.5 mg/dl

Step-by-step explanation:

Given the equation y= -2.5x + 222.5, where 'x' is the time spent exercising in minutes. If we want to know the amount of cholesteron for a person exercising 20 minutes a day, we just have to subtitute 20 into the equation for x.

So we have: y= -2x + 222.5 → y= -2.5(20 minutes) + 222.5 = 172.5 mg/dl

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Use the x-intercept method to find all real solutions of the equation.<br> x^3-8x^2+9x+18=0
meriva

Answer:

a. x=-1,3,\:or\:6

Step-by-step explanation:

The given equation is;

x^3-8x^2+9x+18=0

To solve by the x-intercept method we need to graph the corresponding function using a graphing calculator or software.

The corresponding function is

f(x)=x^3-8x^2+9x+18

The solution to x^3-8x^2+9x+18=0 is where the graph touches the x-axis.

We can see from the graph  that; the x-intercepts are;

(-1,0),(3,0) and (6,0).

Therefore the real solutions are:

x=-1,3,\:or\:6

8 0
4 years ago
Read 2 more answers
Expand the expression.<br> -7(k - 3)<br> -7k + 21<br> -k – 21<br> k+ 21<br> -7k - 21
garri49 [273]

Answer:

-43K+42

Step-by-step explanation:

3 0
3 years ago
during the 8-month shrimping season in the Gulf mexico, 325 shrimpers caught 4,913,977 pounds of shrimp and sold the shrimp $2 p
Hatshy [7]
STEP 1:
Find the $ total sold. Multiply total pounds by $2 sale price per pound.

=4,913,977 pounds * $2 a pound
=$9,827,954 total sold

STEP 2:
Divide the total sold above by the 325 shrimpers.

=$9,827,954 ÷ 325
=$30,239.858

Rounded to nearest dollar:
Each of the 325 shrimpers will take home $30,240.

Hope this helps! :)
4 0
3 years ago
(08.06 MC)
Aleks04 [339]
A. 2x+y=25; x+y=20
x represents cheese wafers and y represents chocolate wafers.

B. I will choose elimination since there is y and y. I can multiply one equation by -1 to get y and -y, which cancels out.
2x+y=25
-x-y=-20

Add equations
x=5

Plug x in
5+y=20
y=15

Final answer: 5 cheese wafers, 15 chocolate wafers
3 0
3 years ago
Which expression is equivalent to 10x2y + 25x2?
babymother [125]
10 x^{2} y +25 x^{2}  = 5 x^{2} ( \frac{10 x^{2} y +25 x^{2} }{5 x^{2} })  = 5 x^{2} ( \frac{10 x^{2} y}{5 x^{2} } +  \frac{25 x^{2} }{5 x^{2} } ) = 5 x^{2} ( \frac{2y}{1} +  \frac{5}{1} )

Answer A   5x² * ( 2y + 5)
7 0
4 years ago
Read 2 more answers
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