Mathematics High School

If there are 70 students in a school and 30% are seventh graders how many seventh graders are there

Answers

Answer 1

Answer:

21

Step-by-step explanation:

Answer 2
21 students are 7th graders


Step by step explanation

Because 70 students is 100% and 30% of of the 100% which is 70 all you have to do is multiple my 0.3 since it’s 30 percent you do 0.3 which equals 0.30 if it was 3% you would use 0.03 that was just to let you know now if you multiple 70 times 0.3 you get 21 which is the number of students that are 7th graders.

Related Questions

t÷5/12= -3/10
Thank you if you help :)

Answers

Answer:

t = -1/8.

Step-by-step explanation:

t / 5/12 = -3/10          Invert the 5/12 and multiply:

12t / 5 = -3/10

Cross multiply:

12t * 10 = 5 * -3

120t = -15

t = -15/120 = -1/8.

What is the vertex function g(x)=3x^2-48x+199

Answers

Answer:

(8,192)

Step-by-step explanation:

1.
Does the equation y = -x + 2 have a
positive or negative slope?

Answers

This equation will have a Negative

I believe the awnser is negative

in Nathan's pocket there nickels and quarters. There are three more nickels than twice the number of quarters. The coins amount to $2.60. How many quarters does Nathan have in his pocket? How many nickels does Nathan have in his pocket?​

Answers

He has ten quarters and 1 dime

need help asap dont know how to do it​

Answers

Division. Divide 45 by -3
Would you be asking for help with Question 13 or 14?

answer with work plus it's the bottom one

Answers

4x+7=23 is the equation
4x=16
x=4
the number is 4

can someone help me answer this
Rewrite the equation 2y−4x=10 in function notation where f(x)=y.

Answers

Answer:

f(x)=5+2x

Step-by-step explanation:

Write an algebraic expression to represent the following:

The product of 7 and the sum of a number, y, and 3.

Answers

Answer:(7+x)(y+3)

Step-by-step explanation: 7 plus X times Y plus 3

Type the missing number in this sequence:
-5,
20,
-80,

-1,280,
5,120

Answers

Answer:

320

Step-by-step explanation:

multiples of -4

Answer:

320

Step-by-step explanation:

it looks as if it is multiplied by -4 every time.

-5 x -4 = 20

20 x -4 = -80

-80 x -4 = 320

Based on the equation 6x + 2y = 30, what is the missing value in the table?

x
y
?
0
3
5
15
30

Answers

Answer:

5

Step-by-step explanation:

Answer:

the answer is b on edge

Step-by-step explanation:

ok

What is the slope of the line that passes through the points (4, -1)
And (-2,4)

Answers

Answer:

-5/6

Step-by-step explanation:

The formula for slope is [ y2-y1/x2-x1 ].

4-(-1)/-2-4

5/-6

-5/6

Best of Luck!

Answer:

5/-6

Step-by-step explanation:

The slope formula is (y2 - y1)/(x2-x1).

Plug in the numbers.

4 - -1/-2 - 4

5/-6

H E L P!


Your brother has a bag of marbles. He has 8 green marbles, 3 blue marbles, 7 red marbles, and 2
yellow marbles.

What is the ratio of blue and yellow marbles to red marbles?

(Write your ratio as a
fraction)

Answers

Answer:

3+2:7

Step-by-step explanation:

Answer:

1/5

Step-by-step explanation:

Blue mables: 3

green and red marbles: 8 + 7 = 15

then, the radio blue:(green+red) is:

3 : 15

simplified unit rate is:

3/3 = 1

15/3 = 5

then:

3:15

is equal to:

1:5

=

1/5

Twenty people each had 36 carrots. How many carrots are there altogether?

Answers

You know that there are 25 people and each person had 36 carrots. To find how many carrots everyone has in total, you have to multiply 25 by 36.

25 times 36 is 900.

There are 900 carrots altogether.

Please hurry I need this fast

Answers

Answer:

int option 3

Step-by-step explanation:

Answer:

I think it is option 4

Step-by-step explanation:

could be 3 possiblyu

Express this number in scientific notation.
245,600,000,000
plzzzzz hurry!

Answers

Answer:

2.456 × 10^11

Step-by-step explanation:

What are the physical properties. (Short answer please)

Answers

Answer:

Step-by-step explanation:

A physical property is any property that is measurable

A physical property is any property that is measurable

The scale on a map is 1 inch= 2.5 miles. Two towns on the map are 6 inches apart. What is the actual distance between the towns in miles

Answers

Answer:

15 miles

Step-by-step explanation

After setting up a ration you multiply the 2.5 by 6 to get 15.

A person has a rectangular board 12 inches by 16 inches around what she wants to put a uniform border of shells if she hasn't of shells were border whose area is 128 square in determine the width of the Border

Answers

Answer:

2 inches

Step-by-step explanation:

Given that:

Dimensions of rectangular board = 12 inches by 16 inches

Area of uniform border around the rectangular board = 128 square inches

To find:

Width of the border = ?

Solution:

Let the width of the uniform border = [tex]x[/tex] inches

Now, there are two rectangular shapes after the addition of border.

One rectangle with the border, one without the board.

Area of border can be found by subtracting the area of board from the area of rectangle with the board.

Dimensions of the rectangle with the border = (12+2[tex]x[/tex]) inches by (16+2[tex]x[/tex]) inches

Area of rectangle = Length [tex]\times[/tex] Width

So, area of border = ((12+2[tex]x[/tex]) [tex]\times[/tex] (16+2[tex]x[/tex])) - 16 [tex]\times[/tex] 12 = 128 square inches

[tex]\Rightarrow 4x^2+56x+192-192=128\\\Rightarrow 4x^2+56x-128=0\\\Rightarrow x^2+14x-32=0\\\Rightarrow (x+16)(x-2)=0\\\Rightarrow x = 2, -16[/tex]

Width can not be negative, so possible value of width = 2 inches

Solve for x. 0=2x^2 - 8 x - 10

Answers

Answer:

its 1 or -5

Step-by-step explanation:

need help with math ​

Answers

2) no solution

3) x=3

Since y’all so smart Write each fraction or mixed number as a decimal.
9 29
40

Answers

Okay

.9

then

.29

also

.40

HA THERE YOU GO

9<=t<=12
what would t equal?

Answers

Answer:

t equals [9,12]

A bottle of water contains 450ml. How many litres of water are there in 8 of these bottles

Answers

Answer:

3.6 litres

Step-by-step explanation:

1 bottle = 450ml

8 bottles = 450 × 8

               = 3600ml

1000ml = 1 litre

3600ml = 3.6 litres (3600÷1000)

Answer:

3.6 litres

Step-by-step explanation:

1 bottle = 450ml

8 bottles = 450 × 8

              = 3600ml

1000ml = 1 litre

3600ml = 3.6 litres (3600÷1000)

How can you drop two eggs the fewest amount of times, without them breaking?

Answer, please

Answers

Drop the egg from half way up the building. This divides the search space in half. If it breaks, start on the bottom floor and work your way up the top :) Hope it works

Did I do this right? Pls help thx

Answers

I am sure your right!!!

Answer:

yes that is correct

Step-by-step explanation:

My teacher said to do an number line with it :(

Answers

Answer:

3+1¼=⅓+1/5=8/15

Final answer is 8/15

Step-by-step explanation:

Im not sure.....

If Kara cuts 2 pounds of cheese into blocks that each weigh
1
3
pound, how many blocks of cheese will she make?
blocks

Answers

The answer would be 6 blocks of cheese

4x - 30x3 - 4x2
What is the polynomial in standard form

Answers

Answer:

-368

Step-by-step explanation:

- 30x^3-4x^2+4x Hope this helps !

2/5 divided by 1/8. Simplest form

Answers

Answer:

1/20 or in a decimal 0.05

Step-by-step explanation:

Hope This helps :)

Answer:

The correct answer is 3 and 1 over 5 also written as 3 1/5

Step-by-step explanation:

HAVE A GOOD DAY!

TRUE OR FALSE? 8 + 3 = 3 + 8 5 + 4x = 3d + 2 + 3 9- 3h = -3h + 9​

Answers

Answer:

false

Step-by-step explanation:

1+2, 1/3+1/4, 2^3 * 2^2

(x+1)(x+2) (Simplify Example), 2x^2+2y a x=5, y=3 (Evaluate Example)

y=x^2+1 (Graph Example), 4x+2=2(x+6) (Solve Example)

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