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3 years ago

15

What is 2+2+6+5x7? Points to whoever can answer! (:

2 answers:

spayn [35]3 years ago

4 0

Answer:

5x7= 35+6+4= 45

Step-by-step explanation:

babunello [35]3 years ago

3 0

Answer:

45

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A neuroscientist measures the reaction times (in seconds) during an experimental session in a sample of cocaine-addicted (n = 8)

Marysya12 [62]

Answer:

14.69 seconds

Step-by-step explanation:

The weighted mean is used to calculate the mean of numbers which don't have the same "weight" or statistical relevance. In this case, that relevance is based on the sample size of each group from which the mean reaction times were obtained.

For all three samples, the weighted mean is obtaining by multiplying each one of the mean reaction times by its <em>n value, </em>adding them, and dividing that result by the sum of all n values.

$WM=\frac{11*8+18*12+13*6}{8+12+6} =14.69\\$

8 0

4 years ago

What is the length of side BC of the triangle? Make sure to show all of your work!

Ostrovityanka [42]

You have to first get the x by its self by canceling it out so subtract 3 and what you do to one side you do to the other. so that means that -3(-3) two negatives = a positive so thats 6 so what you should have now is x+6

6 0

3 years ago

Read 2 more answers

A. Write the formula for the area A of a trapezoid. Use b1 and b2 for the lengths of the bases, and use h for the height.

lesya692 [45]

Answer:

(a) The formula for the area A of a trapezoid

$A = \frac{1}{2}(b_{1}+ b_{2})h$

(b) Solve the formula for h

$h = \frac{2A}{b_{1}+b_{2}}$

(c) Find the height h of the trapezoid

The height h of the trapezoid is 6 cm.

Step-by-step explanation:

(a) The formula for the area A of a trapezoid

As b₁, b₂ being the lengths of the bases and 'h' is the height.

So, the formula for the area A of a trapezoid

$A = \frac{1}{2}(b_{1}+ b_{2})h$

(b) Solve the formula for h

As the formula for the area A of a trapezoid is

$A = \frac{1}{2}(b_{1}+ b_{2})h$

So, formula for height h of trapezoid

$h = \frac{2A}{b_{1}+b_{2}}$

(c) Using the new formula to find the height h of the trapezoid

Using $h = \frac{2A}{b_{1}+b_{2}}$ to find the height h of the trapezoid.

So,

$h = \frac{2A}{b_{1}+b_{2}}$

$h = \frac{2(72)}{16+8}$ ∵b₁ = 16, b₂ = 8, A = 72cm²

$h = \frac{144}{24}$

$h = 6 cm$

So, h = 6 cm

Hence, The height h of the trapezoid will be 6 cm.

Keywords: area of trapezoid, length, base, height

Learn more about height of trapezoid from brainly.com/question/9967451

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4 years ago

Tolen has 18 dog treats. He gives the same number of treats to 6 dogs at the animal shelter. Which two equations could be used t

liubo4ka [24]

1) 18/6=x
2) 6•x=18

I’m not absolutely positive if that’s correct but I’m 98% sure

8 0

4 years ago

calcula la diagonal de un cuadrado cuyo lado tiene cada una de las siguientes medidas en centímetros. a.4 b.7 c.13

Colt1911 [192]

Answer:

$4\sqrt{2}\\\\7\sqrt{2} \\\\13\sqrt{2}$

Step-by-step explanation:

Well the diagonal using pythagora's theorem:

$x\sqrt{2}$ where x is the lenght is the side of the square

so when x=4

$4\sqrt{2}$

when x=7

$7\sqrt{2\\}$

when x=13

$13\sqrt{2}$

8 0

3 years ago