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3 years ago

I need help please HELLLLLLPPPPPPPPPP

Mathematics

1 answer:

jarptica [38.1K]3 years ago

8 0

Answer:

X=4 and the other one is X=20

Step-by-step explanation:

The formula to find the area of a triangle was l•w divided by2.

4•20=80

80/2=40

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We are given the standard deviation for the samples, hence, the t-distribution is used to solve this question.

The standard errors are given by:

$s_A = \frac{1.79}{\sqrt{18}} = 0.4219$

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3 years ago

Solve the equation. Then check your solution. 6 = negative 2 (10 n + 7)

kipiarov [429]

Answer:

n = - 1

Step-by-step explanation:

Hi !

6 = - 2(10n + 7)

6 = - 20n - 14

20n = - 6 - 14

20n = - 20

n = - 20 : 20

n = - 1

6 = - 2(10×-1 + 7)

6 = - 2(-10 + 7)

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6 = 6 (true)

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