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3 years ago

. Which algebraic expression is equivalent to the expression below?

1 answer:

5 0

Since you are not distributing at all, you can ignore the parenthesis :)

When ignoring the parenthesis your equation is
18x + 11 - 4x

Then just combine like terms :)

14x + 11

Your answer is C.

Hope this helped!

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A researcher wants to estimate the mean weekly family expenditure on clothing purchases and maintenance. First, she needs to det

Blizzard [7]

Answer: C. 461

Step-by-step explanation:

We know that the formula to find the sample size is given by :-

$n=(\dfrac{z^*\cdot \sigma}{E})^2$

, where $\sigma$ = Population standard deviation from prior study.

E = margin of error.

z* = Critical value.

As per given , we have

$\sigma=125$

E= 15

Significance level : $\alpha=0.01$

Critical value (Two tailed)= $z^*=z_{\alpha/2}=z_{0.005}=2.576$

Now , Required sample size = $n=(\dfrac{(2.576)\cdot 125}{15})^2$

$n=(21.4666666667)^2\\\\ n=460.817777779\approx461$ [Round to next integer]

Hence, the required sample size to be taken is 461.

Correct answer = C. 461

3 0

4 years ago

Y=x^2-2x-3 complete the square in vertex form

Butoxors [25]

Answer:

(x-1)^(2)-4

Step-by-step explanation:

4 0

3 years ago

Use substitution. What is the solution to the system of equations?<br><br> y=1/2x+2<br> 2y=x+4

morpeh [17]

Answer: Infinitely many solutions.

Step-by-step explanation:

$y=\frac{1}{2}x+2\\2y=x+4\\$

Use $\frac{1}{2} x+2$ for y in $2y=x+4$

$2(\frac{1}{2}x+2)=x+4\\x+4=x+4\\x-x = 4-4\\0=0$

Infinitely many solutions.

4 0

3 years ago

PLEASE HELP!!!!

Aleksandr [31]

Answer:

1 bracelet 8 red 15 yellow

2 bracelet 16 red 30 yellow

3 bracelets 24 red 45 yellow

12 bracelets 96 red 180 yellow

Step-by-step explanation:

Multiply bracelet times 8 red and 15 yellow

5 0

3 years ago

ashley has 1.75 liters of water to use in a science experiment.If she pours equal amount of water in each 5 beaker, how many mil

Lubov Fominskaja [6]

Simply divide 1.75 by 5 to find that 0.35 mL of water will be in each beaker.

5 0

3 years ago