3 years ago

Solve for x be sure to show your work.

Mathematics

2 answers:

svp [43]3 years ago

8 0

180=5x-14+3x+2. 180=8x-12. 192=8x. x=24

Naddik [55]3 years ago

4 0

Answer:

−37x−28 I am not fully sure

Step-by-step explanation:

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The sample consisted of 50 night students, with a sample mean GPA of 3.02 and a standard deviation of 0.08, and 25 day students,

bulgar [2K]

Answer: The test statistic is t= -0.90.

Step-by-step explanation:

Since we have given that

n₁ = 50

n₂ = 25

$\bar{x_1}=3.02\\\\\bar{x_2}=3.04\\\\\sigma_1=0.08\\\\\sigma_2=0.06$

So, s would be

$s=\sqrt{\dfrac{n_1\sigma_1^2+n_2\sigma_2^2}{n_1+n_2-2}}\\\\s=\sqrt{\dfrac{50\times 0.08^2+25\times 0.06^2}{50+25-2}}\\\\s=0.075$

So, the value of test statistic would be

$t=\dfrac{\bar{x_1}-\bar{x_2}}{s(\dfrac{1}{n_1}+\dfrac{1}{n_2})}\\t=\dfrac{3.02-3.04}{0.074(\dfrac{1}{50}+\dfrac{1}{25})}\\\\t=\dfrac{-0.04}{0.074(0.02+0.04)}\\\\t=\dfrac{-0.04}{0.044}\\\\t=-0.90$

Hence, the test statistic is t= -0.90.

7 0

3 years ago

(-2 1/3 + 5 1/5) + 1 1/3 =

Iteru [2.4K]

4Answer:

exact form:

$\frac{21}{5\\}$

decimal form:

4.2

mixed number form:

4 $\frac{1}{5}$

Step-by-step explanation:

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3 years ago

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Solve for x: 2/7(x-2) = 4x

zheka24 [161]

Answer:

2/7(x-2)=4x

(2×x-2×2)/7 = 4x

(2x-4)/7 = 4x

2x-4×(1) = 4x × 7 ( Cross multiply)

2x-4 = 28

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2x÷2 = 32÷2

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3 years ago

Which rational number could be graphed between -3 and -4?

grandymaker [24]

Answer:

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4 years ago

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Gina lives 12 miles from school.she rides her bike everyday.if the tire popped by a nail when she was 1/4 of the way to school h

Citrus2011 [14]

3 miles is the answer

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4 years ago