Mathematics Middle School

Ella’s test grades in her history class are 89, 94, 82, 84, and 98. What score must Ella make on her next test to have a mean test score of 90?

needed on the next test

Answers

Answer 1
You need 6 test scores to find the mean test score.
So we need to find the average of all the test scores.
That means we have to add all the test scores and divide by 6 because there are 6 test scores. Let’s think the the s
89+94+82+84+98+x/6=90
(X is the score that ella must have)
447+x/6=90
447+x=90x6
447+x=540
x=540-447
x=93. (Ella must have 93 test scores to have a mean test score of 90)

Related Questions

cone A and cone B are similar. The radius of cone a is 5.4 feet and the radius of cone b is 16.2 feet. if the surface area of cone a is 43 square feet, find the surface of cone b

Answers

129 is the answerrrrrrrrr

The surface area of cone B is 387 square feet.

What is a cone?

It is a shape of a christmas tree where there is a base of radius r and a top point called the apex.

We have,

Since the cones are similar, their corresponding dimensions are proportional.

In particular, the ratio of their radii is equal to the ratio of their surface areas.

Now,

Let S be the surface area of cone B, then we have:

ratio of radii = 16.2/5.4 = 3

ratio of surface areas = S/43

Since the ratio of surface areas is equal to the ratio of radii squared,

We have:

3² = S/43

9 = S/43

S = 9 x 43

S = 387

Therefore,

The surface area of cone B is 387 square feet.

Learn more about cone here:

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A farmer sells 7.2 kg of pears and apples at the farmer's market. 2/5 of this weight is pears, and the rest is apples. how many kg of apples did she sell at the farmer's market?

Answers

Answer:

The farmer sold 4.35 kg of apples at the farmers market.

Step-by-step explanation:

what is 60 percent of 7.2?

4.35

:) If you need more explenation please comment :)

so i suck at this stuff

Answers

h is independent, d is dependent because it says the “ same time “ meaning the time won’t change .
you already got the answer but i just wanted to say respect with the killua pfp

what is the area of a quarter circle with a radius of 10? (answer needs to be in terms of pi)

Answers

Answer:

314.16

Step-by-step explanation:

the answer is 314.16

Many games involve chance and they usually involved either dice or cards. For this activity, we will look at a common game called 7‐11 where two dice are rolled. If the roll adds up to 7 or 11, the player wins. If the roll adds up to 2, 3, or 12, the player loses. If there is any other sum, it is a draw (no winner or loser). Use this two‐dice roll scenario to complete the problems below.

1. Create a tree diagram to determine all the possible outcomes of rolling two dice.

Answers

I’m going to categorize them of how you win or lose.

Win: 3 +4, 6+1, 2+5, 5+6
Loses: 1+1, 2+1, 6+6
Draw: 1+3, 2+2, 3+2, 4+1, 3+3, 1+5, 4+2, 3+5, 4+4, 6+2, 3+6, 4+5, 4+6, 5+1, 5+2, 5+5

what is the point 2,1 dilated by the scale factor of 2.5

Answers

The answer would be -0.4

Answer:

The answer would be -0.4

Step-by-step explanation:

WILL MAKE BRAINLYEST
Which expression is equivalent to 3−12+223−56?
A. 216−216
B. 56+216
C. 216+216
D. 216−56

Answers

Answer:

none

Step-by-step explanation:

3−12+223−56=158

216−216=0

56+216=272

216+216=432

216−56=160

Brainliest?

None of the answer choices are correct

helpppppppp pleaseeeeee :)))))

Answers

18.4 because $16 per hour x 1.15= $18.4
$18.40 per hour. She made $16 before and with a 15% increase, it will add $2.40

y = 4
Graph the equation on the coordinate plane to the left. What is the y-value when x is 5? What is the slope of the equation? Answer these questions in the text box below.

Answers

Answer:

when [tex]x=5[/tex], [tex]y=4[/tex]

the slope is 0

Step-by-step explanation:

There isn't much to explain.

Whoever is right gets brainiest and 5 stars

Answers

Answer:

The answer is D. 10 1/3

~ Hoped this helped~

~Brainiliest and 5 stars please!~

The answer is d for your question

the graph shows a proportional relationship which equation matches the graph? *ribbit* please help i need to pass this or my mum will get mad 0-0

Answers

Answer:

C. y = 5x

Explanation:

(5 - 15) / (1 - 3)

-10 / -2

5

Answer:

C. y = 5x

Step-by-step explanation:

(5 - 15) / (1 - 3)

-10 / -2

5

The figure is made up of a semicircle and a triangle. Find the perimeter. Round your answer to the nearest hundredth. 25 ft 7 ft 24 ft The perimeter is about feet​

Answers

120.27 or rounded to the nearest tenth is 120.3

Which selection shows the correct order of points from least to greatest on the number line?

Answers

I don’t have time to actually do it but if you don’t know how you will have to put all the numbers under the same number GCF so that you can see which one is largest and smallest. Then you will have to do this for all the possible answers
B is the answer I hope this helps

Use the distributive property to write an expression that is equivalent to 8( a + 4 ). 8(a+4) = blank a + blank

Answers

Answer:

8a+32

8(a+4)= 8a+32

Hope it helps :D

Step-by-step explanation:

Answer:

[tex] \sf \: 8a + 32 [/tex]

Step-by-step explanation:

Now we have to,

→ Find the equivalent expression.

The property we use,

→ Distributive property.

The expression is,

→ 8(a + 4)

Let's simplify the expression,

→ 8(a + 4)

→ 8(a) + 8(4)

→ (8 × a) + (8 × 4)

→ 8a + 32

Hence, the answer is 8a + 32.

Use the net to find the surface area of the square pyramid
A) 385 ft2
B) 473 ft2
C) 526 ft2
D) 568 ft2

Answers

It’s B
16•11 is equal to 176
176 divided by 2 is 88
Then 88 times 4 is 352
And 11 times 11 is equal to 121
So. 352+121 is equal to 473 ft^2
It is 473 feet , i know this because you multiply

Which story shows 3 ÷ 1/6? 3 cups of glue are divided into 1/6-cup containers. 1/3 cup of glue is divided into 1/6-cup containers. 1/3 cup of glue is divided into 6-cup containers 3 cups of glue are divided into 6-cup containers.

Answers

Answer:

First one

Step-by-step explanation:

3 cups of glue divided into 1/6 cup containers

Please help I will give brainly and show your work also :)

Answers

Use a calculator what?
You can move the decimal point to the left depending on the number of zeros
Example
0.06401 /1000
1000 has three zeros so move the decimal point to the left three times
= 0.00006401

please help I will really appreciate it

Answers

Hi!
Where’s the question.

Answer:

where is the question friend

Which two expressions are equivalent? *
2 points
21x + 14 and 7(3x + 2)
23x – 14 + 2x and 21x + 14
x + x + 5 and x2 + 5
9x2 + 9x + 5 and 18x2 + 5
PLS ANSWER

Answers

Answer:

I believe that the answer is 21x+14 and 7(3x+2).

Step-by-step explanation:

I hope this helps, have a blessed day.

Answer:

A. 21x + 14 and 7(3x + 2).

Step-by-step explanation:

23x - 14 + 2x = 21x + 14

25x - 14 ≠ 21x + 14

x + x + 5 = x² + 5

2x + 5 ≠ x² + 5

9x² + 9x + 5 ≠ 18x² + 5

21x + 14 = 7(3x + 2)

21x + 14 = 21x + 14.

Your answer is A, 21x + 14 and 7(3x + 2).

Which of these is an example of a rectangular prism?

A
a round can of soup

B
a pile of rectangular cards

C
a pile of circular Frisbee

D
a stack of triangular hats

Answers

Answer:

B

Step-by-step explanation:

Answer:

B. a pile of rectangular cards

this is because the cards are rectangular and they form the sides of the prism. then when they come together, they form triangles, which are the bases.

3 help please
Xxxxxxx

Answers

Answer:d

Step-by-step explanation:

Answer:

D) 472

Step-by-step explanation:

Surface Area formula:

SA = 2(wl + hl + hw)

Given:

w = 7

l = 12

h = 8

Work:

SA = 2(wl + hl + hw)

SA = 2(7 x 12 + 8 x 12 + 8 x 7)

SA = 2(84 + 96 + 56)

SA = 2(236)

SA = 472

Here are the scores for landing an arrow in the colored regions of the archery target.
Yellow: 10 points

Red: 8 points

Blue: 6 points

Green: 4 points

White: 2 points
Andre shot three arrows and they landed at (-5,4),(-8,7) and (1,6). What is his total score?

Answers

Answer:2

Step-by-step explanation: 2

NO LINKS

1. On a grid, draw three different irregular figures and estimate the area of each one.

2. Draw two different irregular figures with about 12 square units. What strategy did you use to draw each figure?

3. What method(s) did you use to estimate the area of the figures you drew, and the figures in the animation?

4. How accurate do you think your estimates were?

5. Can you think of any real life situations where we would need to find the area of irregular figures?

List three figures that you have found the area of in this unit.


On a grid, draw three different irregular figures and estimate the area of each one.
Draw two different irregular figures with about 12 square units. What strategy did you use to draw each figure?
What method(s) did you use to estimate the area of the figures you drew, and the figures in the animation?
How accurate do you think your estimates were?
Can you think of any real life situations where we would need to find the area of irregular figures?

Answers

Answer:

clro sia

Step-by-step explanation:

Select who numbers that are equivalent to 8.6

Answers

Answer:

C I believe if I'm wrong please correct me

hehe hoi answer this for pog points

Answers

Answer:

D 7 degress is x

Step-by-step explanation:

pls help will give brainliest

Answers

Answer:

3%

Step-by-step explanation:

42%-39%=3%

What the guy above me said

Select TWO statements that can be represented by -40 feet.



Group of answer choices

The length of a sailboat

The length of a sailboat

The length of a piece of ribbon

The change in altitude of a balloon

The distance of a tree branch above the ground

The distance of a fish below the surface of the water

Answers

the change in altitude of a balloon
the distance of a fish below the surface of water
The change in altitude of a balloon and the distance of a fish below the surface of the water

can someone pls help mee:( i dont understand

Answers

Answer:

A. How many states make up the United States of America.

Step-by-step explanation:

a) how many states make up the united states of america

What is the value of B for the following triangular prism?
3 by 4 by 5

Answers

Answer:

3x4x5=60

Step-by-step explanation: another way to put this is 3x4=12, and 12x5=60.

The value of B for the triangular prism will be equal to 60.

What is a triangular prism?

A triangular prism is a polyhedron constructed of two triangular bottoms and three rectangular flanks. It is a three-dimensional body that has three flank faces.

The value of B will be calculated as:-

B = 3  x  4  x  5

B  =  60

Therefore the value of B for the triangular prism will be equal to 60.

To know more about prism follow

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please help I will appreciate it

Answers

Hello please send in the photo? Where’s the question

Answer:

A) 4 [ x-value of the intercept of the 2 lines]

Step-by-step explanation:

B) the number of months taken for the cost of band to be equal to the cost of soccer

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