3 years ago

10 students of a class had a mean score of 70. The remaining 15

Mathematics

1 answer:

Anton [14]3 years ago

3 0

Oops someone else answered it before me

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Simplify.√75 <br> A.3√5 B.15√5 C.25√3 D. 5√3

stich3 [128]

D, square root of 75= 5 square root 3

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3 years ago

Suppose y varies directly as x write a direct variation equation that relates x and y

Oksana_A [137]

Answer:

y=2/3x

Step-by-step explanation:

A direct variation equation is y=kx. if k=2/3, then if x was 9,y would be 6.

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3 years ago

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Does anyone know how to graph y=4x?

oksano4ka [1.4K]

Answer:

You can use something called Desmos... I hope this helped

Step-by-step explanation:

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3 years ago

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Y=2x+3 <br> y=3x+1 <br> solve the system of equations using substitution

Lynna [10]

Answer:

(2, 7 )

Step-by-step explanation:

Given the 2 equations

y = 2x + 3 → (1)

y = 3x + 1 → (2)

Substitute y = 3x + 1 into (1)

3x + 1 = 2x + 3 ( subtract 2x from both sides )

x + 1 = 3 ( subtract 1 from both sides )

x = 2

Substitute x = 2 into either of the 2 equations for corresponding value of y

Substituting x = 2 into (1)

y = 2(2) + 3 = 4 + 3 = 7

Solution is (2, 7 )

4 0

3 years ago

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X²-7=0 extracting square roots

Irina-Kira [14]

Answer:

x = ± $\sqrt{7}$

Step-by-step explanation:

Given

x² - 7 = 0 ( add 7 to both sides )

x² = 7 ( take the square root of both sides )

x = ± $\sqrt{7}$

4 0

3 years ago