7th grade math i mark as brainliest

Answer:

1385mm squared

Step-by-step explanation:

Area of Circle formula: A = pi r^2

You need to divide 42mm by 2 since that is a diameter.

*Half of the diameter is the radius*

42/2 = 21

Now, do 3.14 multiplied by 21 to the power of 2.

Formula: A = 3.14 x 21^2

Do 21^2 first.

That shall be 441

Now do 3.14 x 441

1,384.74mm - That is your exact answer.

The directions tell you to round it to the nearest whole number

THAT IS 1385mm squared

Answer: Sorry if it's wrong I hope I helped you

Answer:

38 in

Step-by-step explanation:

its hard to explain but ik im right ;-;

Answer:

here-

Step-by-step explanation:

hope it helped-

Answer:

now u can make the other person brainliestttt :DD

Step-by-step explanation:

Answer:

A, B, C, E, F

Step-by-step explanation:

Hope I helped!! PLs give brainliest!!

Answer:

Range⇒ 8

Mode⇒ 3

Step-by-step explanation:

Hope this helps

Answer:

mode is 2

Range is 6

Step-by-step explanation:

range is when you take the highest number which would be 8 and you minus by the lowest number which is 2 thus equals 6

Answer:

the ansere is -20

Step-by-step explana

The speed is given by the arithmetic mean. Then the jet Alyssa's average speed on the round trip is 540.

The total distance covered by the particle or the body in a total time is called average speed. It is a scalar quantity. It is the ratio of distance to time.

We know that the average speed formula

[tex]\rm v_{a} = \dfrac{v_1+ v_2}{2}[/tex]

The speed of the jet Alyssa flew on from Boston to London was 480 mph.

On her return flight, the speed of the jet was 600 mph with a tailwind.

Then the average speed of the jet will be

[tex]\rm v_{a} = \dfrac{v_1+ v_2}{2}\\\\v_{a} = \dfrac{480 + 600}{2}\\\\v_{a} = 540\ mph[/tex]

More about the average speed link is given below.

https://brainly.com/question/7359669

Answer:

step one!

Step-by-step explanation:

I could be wrong, let me know!

Answer:

b=19ft

Step-by-step explanation:

You do 76(area)/4(height) which gives you 19ft

Answer:

i dont know

Step-by-step explanation:

Answer:

8

Step-by-step explanation:

Its the odd one out

Answer:

I can only help you with the first on the answer is:

Step-by-step explanation:

7/8 * 3/4 = 21/32 which can't be simplified any further

Answer:

2,000 or 2 meters :)

Step-by-step explanation:

We must multiply :)

80 x 25 = 2,000

Since 1 meter equals 1,000 millimeters, 2,000 millimeters will equal 2 meters :)

Have an amazing day!!

Please rate and mark brainliest!!

Answer:

Unknown, not enough information.

How much do the books cost?

2nd option

hope it helps...!!!

LOL! Just use this: https://school.ckseattle.org/documents/2019/2/6_6_Trapezoids_and_Kites.pdf

Answer:

Total amount = 7x + 25

Step-by-step explanation:

Assuming that week can be denoted by a variable, in this case, x. Also assume that the total amount owned is denoted by the variable, y.

Note that $25 is the constant, meaning that that amount will not change. Norm would technically have at least $25 regardless of how much week passes.

The amount that changes per week is the addition of $7.

Set the equation:

Total amount = ($7 per week x  amount of week(s)) + starting amount (constant).

Total amount = 7x + 25

~

Answer:

A: 8 more 7th graders

B: 28%
C:  jump rope

Step-by-step explanation:

10-18= 8

10 out of 280 is 28%

Answer:

Area: 2

I just answered the part about the area because drawing the rectangle is easy.

Answer:

This equation is in standard form: ax 1+bx+c=0. Substitute 9 for a, 16 for b, and −112 for c in the quadratic formula 2a−b±b2−4ac.x= 2×9−16± 16^2−4×9(−112)Square 16.x=2×9−16±256−4×9(−112) Multiply −4 times 9.x=2×9−16± 256−36(−112) Multiply −36 times −112.x=2×9−16±256+4032 Add 256 to 4032.x=2×9−16±4288 Take the square root of 4288.x=2×9−16±8+67 Multiply 2 times 9x=18−16±8=67

Step-by-step explanation:

hope this help if not let me know

To solve for the Principal amount, we will use the formula:

                            P = I / rt

P = principal amount; which is the amount that we will be solving for.

I = the interest accrued within the allotted time frame. ($160)

r = the interest rate percentage. (1.6%)

t = the time frame that the money will accrue interest. (2 years)

Before we can plug in the numbers into our formula, we need to convert our percent into a decimal. To do this, move the decimal two places to the left. This will leave us with 0.016. We'll use that for "r".

Let's plug in the numbers:

P = 160 / (0.016) (2)

Multiply your bottom numbers together for 0.016 x 2 =0.032

P = 160 / 0.032

Divide now.

160 ÷ 0.032 = 5,000.

This tells us that, Bert will need to deposit $5,000 into the savings account to earn $160 within 2 years with a 1.6% interest rate.

Answer: C) He should also take a sample from each of the other history classes in all of the other grades in the middle school.

Step-by-step explanation:

In order for his sample to be representative of all middle school students Leo: C) Should also take a sample from each of the other history classes in all of the other grades in the middle school.

Sample can be defined as the data that is randomly collected by a researcher so as to reach or draw a conclusion.

Since only one grade is being surveyed which is Mr. Barnes’s eighth-grade history classes, he should as well carryout the survey on Ms. Lopez and Mrs. Frank history class.

Inconclusion he should also take a sample from each of the other history classes in all of the other grades in the middle school.

Not only students in the 8th grade are in the middle school, there are other students in other grades who are in the middle school and are enrolled in history classes. Leo's sample is only from one grade of the middle school. In fact, including Ms. Lopez's and Mrs. Frank's classes in the selection of sample is not sufficient. Leo has to take a sample from the remaining grades to avoid making a wrong conclusion as a result of bias in the choice of data.

Answer:

n=-1.5

Step-by-step explanation:

−2(3n−3)+3

Use the distributive property to multiply −2 by 3n−3.

= −6n+6+3

Add 6 and 3 to get 9.

= −6n+9

n=9/-6=-1.5

Answer:

94 in, or about a 25% decrease.

Step-by-step explanation:

Starting surface area- 384

Decreased surface area- 290

384-290=94

To go from 384 to 290 would be a 24.48% decrease.

Answer:

The answer is b= 8

Answer:

add them all togther then subtract them by 50

Step-by-step explanation:

Answer:

3.14

Step-by-step explanation:

The five dollars subtracting what he had left. so that gives you 3.14

☭

Step-by-step explanation:

Answer attached..

Answer:

1864 Remainder 2

Step-by-step explanation:
1864R2
______

5|9322
-5

= 43

-40

=. 32

-30

=. 22

-20

=. 2