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3 years ago

What is the answer to (2a + 3)??

Mathematics

1 answer:

Alekssandra [29.7K]3 years ago

6 0

Answer:

the answer is 3

Step-by-step explanation:

first you isolate the variable and then add or subtract:))

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Literal equations Solve P=2(l+W) for l

Nina [5.8K]

 P = 2(L +W)

Divide each side of the equation by 2 : P/2 = L + W

Subtract W from each side :  P/2 - W = L

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3 years ago

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Heather solved this problem:

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Answer:

A tape diagram. StartFraction part Over whole EndFraction = StartFraction 300 Over 100 EndFraction = StartFraction 75

Step-by-step explanation:

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3 years ago

The scatter plot shows how the distance traveled by a train is related to the amount of fuel used. Which picture shows a reasona

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the answer is the first one

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A student is trying to solve the system of two equations given below: Equation P: y + z = 4 Equation Q: 3y + 7z = 15 Which of th

natulia [17]

Look at them
P: 1y
Q: 3y
multiply first equation by -3 becuase 3y-3y=0
-3P
-3(y-z=4) is answer

A is answer

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3 years ago

A researcher is using a two-tailed hypothesis test with α = .05 to evaluate the effect of a treatment. If the boundaries for the

Solnce55 [7]

Answer:

A. n = 22

Step-by-step explanation:

Hello!

The researcher conducted a one-sample t-tas with the following hypotheses:

H₀: μ = μ₀

H₁: μ ≠ μ₀

α:0.05

The one-sample t-test has "n-1" degrees of freedom and since the hypotheses are two-tailed you know that the rejection region will be divided into two tails with "α/2" for each tail. ± $t_{n-1;1-\alpha /2}$

If α:0.05 then α/2:0.025 and 1-α/2= 0.975

Using the given sample sizes as a reference you look in the table for the corresponding DF for an accumulated probability of 0.975

For n = 22 $t_{21;0.975}= 2.080$

For n= 21 $t_{20;0.975}= 2.086$

For n= 20 $t_{19;0.975}= 2.093$

The correct answer is a) n= 22

I hope this helps!

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4 years ago