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3 years ago

PLEASE HELP ME. this is due TONIGHT and i need this done so i have time for other assignments. thank you so much

Mathematics

2 answers:

vlada-n [284]3 years ago

8 0

Answer:

28cm

Step-by-step explanation:

Area of a parallelogram equals the base length, which is y cm, multiplied by the height, which is 18cm.

Area= 504cm

y cm (base) x 18 cm (height) = 504cm^2 (area)

y cm = 504cm^2 / 18cm

y cm = 28cm

marin [14]3 years ago

6 0

Answer:

28 cm

Step-by-step explanation:

Just use some good ol' algebra:

18y = 504

y = 28 cm

A parallelogram is basically a wonky rectangle, so it uses the same formula for area.

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Question 5 20 pts If the radius of a circle is 28 cm, what is the circumference? (Use 3.14 for pi)

ra1l [238]

Answer:

The circumference of a circle can be found by multiplying pi ( π = 3.14 ) by the diameter of the circle. ... Use 3.14 for pi

6 0

3 years ago

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28 divided by a number s

Eduardwww [97]

Answer:

Step-by-step explanation:

I assume that you are wanting an algebraic expression written. if not, please let me know!

When we divide numbers by each other, we write them as a fraction, the number being divided over the number it's divided by. in this case, the number we're dividing is 28, and the number we're dividing it by an unknown factor s.

8 0

3 years ago

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The last question 4. Is 1.5 56ft PLZ HELP GOD BLESS U AND UR GRades

Contact [7]

Answer: First option.

Step-by-step explanation:

You know that the following function model the height "h" of the ball (in feet) after a time "t" (in seconds):

$h=-16t^2+48t+8$

Notice that it is a Quadratic function, therefore, it is a parabola.

Then, the x-coordinate of its vertex will give you the time in seconds in which the balll reaches its maximum height and the y-coordinate of the vertex will give you the ball's maximum height.

You can find the x-coordinate of the vertex with this formula:

$x=t=\frac{-b}{2a}$

You can identify that:

$a=-16\\b=48$

Substituting values, you get:

$x=t=\frac{-48}{2(-16)}=1.5$

FInally, you must substiute this value into the Quadratic function and then evaluate in order to find the ball's maximum height.

This is:

$h=-16(1.5)^2+48(1.5)+8=44$

5 0

3 years ago

Suppose y varies inversely with x, and y = 18 when x = 12. What is the value of x when y = 24? NO LINKS OR ANSWERING YOU DON'T K

Luba_88 [7]

Answer:

B. 9

Step-by-step explanation:

We are given that y varies inversely with x. Recall that inverse variation has the form:

$\displaystyle y=\frac{k}{x}$

Where k is the constant of variation.

We are given that y = 18 when x = 12. Hence:

$\displaystyle (18)=\frac{k}{(12)}$

Solve for k. Multiply both sides by 12:

$k=12(18)=216$

Thus, our equation is:

$\displaystyle y=\frac{216}{x}$

We want to find x when y = 24. Substitute:

$\displaystyle \frac{24}{1}=\frac{216}{x}$

Cross-multiply:

$24x=216$

Divide both sides by 24. Hence:

$x=9$

Our answer is B.

5 0

3 years ago

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Say that the national weather service claims the average number of tornados that occur in Ohio annually is 52. Your team of weat

g100num [7]

Answer: we would reject the null hypothesis that the mean was equal to 52 at a level of significance of alpha = 0.05.

Step-by-step explanation:

The null hypothesis is the hypothesis that is assumed to be true while the alternative hypothesis is the statement that is believed to be true if the null hypothesis is rejected.

From the given information, the null hypothesis is

µ = 52

The decision rule would be to accept the null hypothesis if the level of significance is lesser than the p value and reject the null hypothesis if the level of significance is greater than the p value

Since alpha, 0.05 > than the p value, 0.016, then we would reject the null hypothesis.

7 0

3 years ago