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3 years ago

If N=10 then what is 2n+4

2 answers:

8 0

2n+4 is 24 because when you plug in the variable it makes the expression (2)(10)+4, so you simplify that by multiplying 2 and 10 and then add 4 to get 24

SOVA2 [1]3 years ago

3 0

If n is ten then the expression would change to
2(10)+4
20+4
so your answer would be 24

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Find the vertex of the following equation <br>y= (x+9)^2+8<br>

Olegator [25]

(-9,8) is the answer (h,k) is the equation

8 0

3 years ago

The Hawthorne Works was a large Western Electric factory with 45,000 Select all that apply. employees. During the 1920s and 1930

Georgia [21]

Answer:

Option E

Step-by-step explanation:

Single-blinding refers to a kind of clinical trial in which only the researcher conducting the study knows which treatment or the participant is receiving until the trial is over.

Control Group refers to the group in an experiment that does not receive treatment by the researchers, it is used as a benchmark to measure how the other tested subjects do.

Under the random assignment, the study participants are randomly allocated to different groups, such as the experimental group, or treatment group.

Confounding can be controlled by adjusting for it after completion of a study using stratification or multivariate analysis.

The treatment group refers to the experimental groups that receive treatment in an experiment. The “group” is made up of test subjects (people, animals, plants, cells, etc.) and the “treatment” is the variable under study.

Since here we are making groups to perform the experiment away from the main workforce, the feature used here is the treatment group.

8 0

4 years ago

John is saving ⅔ of his allowance each week for a wireless headphones that he wants to buy. After 6 weeks he has$87 saved for th

cestrela7 [59]

Answer:

21.75

Step-by-step explanation:

if you take 87 divided by 2/3, you get 130.5, which is the total amount of money he makes in 6 weeks. but if you take 130.5 divided by 6, you get 21.75 which is how much he makes weekly.

6 0

3 years ago

Nina and Jo both ran an 8 km race. Nina took 55 minutes to run the whole race. Jo started the race 3 minutes later than Nina but

grin007 [14]

Answer:

Step-by-step explanation:

First we figure out how fast Nina can run. If Nina can run 8 km in 55 minutes, then her rate is

$\frac{8km}{55min}=.145\frac{km}{min}$ and we can use that in a d = rt table:

d = r * t

Nina .145

Now we can fill in the distance which is 6 for both, since that is the distance where they met:

d = r * t

Nina 6 = .145

Jo 6 =

Now we go to the info given about the time. If Jo started the race 3 minutes after Nina, that means that Nina is running 3 minutes longer than Jo. Filling in the time info:

d = r * t

Nina 6 = .145 * t + 3

Jo 6 = r * t

As you can see, right now we have 2 unknowns in Jo's row. But we don't have to! We will go to Nina's row where the only unknown is time and solve for t. If d = rt, then

6 = .145(t + 3) and

6 = .145t + .435 and

5.55 = .145t so

t = 38.379 minutes. This means that Jo was running 38.379 minutes when she caught up to Nina (it took Nina 3 minutes longer than that to go 6 km since she was already running for 3 minutes when Jo started the race). If Jo's time is 38.379, we can use that in her row for t and solve for r. If d = rt, then

6 = r(38.379) and

r = .16 km/min

Let's check it without the rounding (rounding takes away from the accuracy). If 6 = .145(t + 3) and Nina's rate not rounded is .145454545 and t = 38.37931034, then, rewriting without rounding:

6 should equal .145454545( 38.37931034 + 3)

6 ?=? .145454545(41.37931034)

6 ?=? 6.0 so

Jo's rate is .16 km/min rounded

6 0

3 years ago

The sales at Marty's Meat Market increased from $130,000 per month to $136,500. Determine the percent increase.

kicyunya [14]

Hello! For this question, we are looking for the percent of change. The formula for percent of change is change/original = x/100, where change is tge difference between two numbers, and the original is the previous number. 136,500 - 130,000 is 6,500. The original number is 130,000. It would be set up like this:

6,500/130,000 = x/100

Let's cross multiply the values. 6,500 * 100 is 650,000. 130,000 * x is 130,000x. That makes 650,000 = 130,000x. Now, divide each side by 130,000 to isolate the x. 130,000x/130,000 cancels out. 650,000/130,000 is 5. There. x = 5% increase. The answer is A: 5%.

8 0

4 years ago