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3 years ago

15

Linda scored 35, 47, and 42 points on three tests. How many points should she get on the fourth test to get an average score of

50?
A.75 points
B.76 points
C.77 points
D.78 points

1 answer:

Taya2010 [7]3 years ago

6 0

(35+47+42+x)/4 = 50
(35+47+42+x)=4*50
124 +x = 200
x=200 - 124
x= 76

Answer B. 76 points.

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Answer:

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Step-by-step explanation:

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Answer:

8 $\sqrt{6}$ inches

Step-by-step explanation:

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3 years ago

Which are the solutions of x2 = 19x + 1?

Finger [1]

Answer:

$(\frac{19-\sqrt{365}} {2},\frac{19+\sqrt{365}} {2})$

Step-by-step explanation:

we have

$x^2=19x+1$

we know that

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$ax^{2} +bx+c=0$

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$x=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$-x^{2}-19x-1=0$

so

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substitute in the formula

$x=\frac{-(-19)\pm\sqrt{-19^{2}-4(1)(-1)}} {2(1)}$

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$x=\frac{19+\sqrt{365}} {2}$

$x=\frac{19-\sqrt{365}} {2}$

$(\frac{19-\sqrt{365}} {2},\frac{19+\sqrt{365}} {2})$

therefore

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3 years ago

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Answer:

amount spend on groceries = 82.80

percent spend in groceries = 15%

let total paycheck be x

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Step-by-step explanation:

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3 years ago

How to simplify 24/3

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