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kolezko [41]
2 years ago
9

HELP ASAP!!! 2nd time I had to ask this!! Pls give the real answer.

Mathematics
1 answer:
vampirchik [111]2 years ago
7 0

Answer:

1 hour 125, 2nd hour 250, 3rd hour 375

Step-by-step explanation:

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MATH HELP ME ASAP PLEASE
elena55 [62]

Answer:

53lbs.

Step-by-step explanation:

If Kevin bought 3 20lbs. Bags of gravel he would have 60 lbs. of gravel. In the end he has 7 lbs. of gravel left he used 53 pounds.

Equations:

7+x=60 or 60-7=53 lbs.

8 0
2 years ago
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The difference of the square of a number and 24 is equal to 5 times that number. Find the negative solution.
vampirchik [111]

Answer:

the "negative solution" is -3

Step-by-step explanation:

Represent the number by n.

Then n^2 - 24 = 5n

We rewrite this in standard quadratic form:

n^2 - 5n - 24 = 0

This factors as follows;  (n + 3)(n - 8) = 0

The roots are n = -3 and n = 8.  Thus, the "negative solution" is -3

8 0
3 years ago
What is the radius of a circle whose equation is x2 y2 – 10x 6y 18 = 0?
HACTEHA [7]
Hello,

x²+y²-10x+6y+18=0
==>(x²-2*5x+25)+(y²+2*3y+9)+18-25-9=0
==>(x-5)²+(y+3)²=16

Radius is 4.
Center (5,-3)
6 0
3 years ago
Read 2 more answers
On a recent quiz, the class mean was 70 with a standard deviation of 2.1. Calculate the z-score (to 4 decimal places) for a pers
Igoryamba
The equation to find a z score is (x- mean)/(standard deviation)

So, in this case the equation would be
(76-70)/(2.1)

For,
X=76
Mean=70
Standard Deviation= 2.1

After solving we find that the z score equals 2.85714

or

2.8571

5 0
3 years ago
It takes 900 pounds of steel to make one steel beam. How many beams can be made from 6,300 pounds of steel?
stealth61 [152]

Answer:

7

Step-by-step explanation:

6,300 divide by 900 would equal 7

3 0
3 years ago
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