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2 years ago

Solve the inequality 5z+8≥-7

Mathematics

1 answer:

kirza4 [7]2 years ago

3 0

Answer:

z≥−3

Step-by-step explanation:

1 Subtract 88 from both sides.

5z≥−7−8

2 Simplify -7-8−7−8 to -15−15.

5z≥−15

3 Divide both sides by 55.

z≥− 15/5

4 Simplify 15/5 to 3

z≥−3

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2 years ago

207 students went to Rye Playland, Five buses were filled and 7 students traveled in cars,

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Answer:

Step-by-step explanation:

207 - 7 car students

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2 years ago

Find the equation of a line parallel to the line y=-1/3x-1 and passing through the point (3,-3)

victus00 [196]

-3 = -1/3(3) +b

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3 years ago

Given a population mean of 53.7 with a standard deviation of 1.3 and a sample size

a_sh-v [17]

Answer: A. 0.4899 B. 14

Step-by-step explanation:

If X = random variable

then, the standard deviation of the sampling distribution of X = $\dfrac{\sigma}{\sqrt{n}}$

GIven: $\sigma= 1.2, \n= 6$

The standard deviation of the sampling distribution of X = $\dfrac{1.2}{\sqrt{6}}=0.4899$

B. Let n be the sample size,

$0.325=\dfrac{1.2}{\sqrt{n}}\\\\\Rightarrow\ \sqrt{n}=\dfrac{1.2}{0.325}\\\\\Rightarrow\ \sqrt{n}=3.69230769231\\\\\Rightarrow\ n= (3.69230769231)^2=13.6331360947\approx 14$

Hence, the required sample size = 14

3 0

2 years ago

Given that f(x) = x + 4x evaluate f(-2).

Makovka662 [10]

The answer is -10 because when u plug in -2 for x u get 4(-2)=-8 then -2+-8=-10

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2 years ago