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jasenka [17]
2 years ago
5

Find the missing number. Enter your answer. 80 х ? = 640

Mathematics
2 answers:
miss Akunina [59]2 years ago
8 0

Answer:

8

Step-by-step explanation:

640/80=8

8*80=640

Mama L [17]2 years ago
4 0

Answer:

The answer is 8.

Step-by-step explanation:

80x=640

80x /80 = 640 /80

x=8

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A family built a house in a beach resort area. In 1990, the house was 430 ft from the water. With erosion, the house was 400 ft
neonofarm [45]

We develop an equation for the given situation by first writing the general equation for lines,

                                y = mx + b

Substituting to this given the values given above,

(1990)                      430 = b

(2000)                      400 = m(10) + 430

The value of m from the equation in 2000 is -3. Thus, the equation of that relates the variables is,

                              y = -3x + 430

8 0
3 years ago
The cereal box shown below is a rectangular prism. Find the surface area of the cereal box.
aksik [14]

Answer:

Surface area is found:

Surface Area = 1700 cm²

Step-by-step explanation:

(The cereal box is shown in the ATTACHMENT)

The surface area of a rectangular prism can be found by added the areas of all 6 sides of the rectangular prism.

L = length = 20 cm

H = height = 30 cm

W = Width = 5 cm

<h3 /><h3>Side 1:</h3>

A(1) = L×H

A(1) = 20×30

A(1) = 600 cm²

<h3>Side 2:</h3>

As the measurements of the side at the back of side 1 has the same measurement of side 1. then:

A(2) = 600 cm²

<h3>Side 3:</h3>

A(3) = L×W

A(3) = 20×5

A(3) = 100 cm²

<h3>Side 4:</h3>

As the measurements of the side at the back of side 4 has the same measurement of side 4. then:

A(4) = 100 cm²

<h3>Side 5:</h3>

A(5) = H×W

A(5) = 30×5

A(5) = 150 cm²

<h3>Side 6:</h3>

As the measurements of the side at the back of side 5 has the same measurement of side 5. then:

A(6) = 150 cm²

<h3>Surface Area:</h3>

Adding areas of all the sides

A(1) + A(2) + A(3) +A(4) + A(5) + A(6) = 600 + 600 + 100 +100 + 150 +150

Surface Area = 1700 cm²

8 0
3 years ago
Read 2 more answers
Will mark brainliest Let f(x)=x2+3x+2 .
PSYCHO15rus [73]
METHOD 1
f(3) = 20
f(4) = 30
f(5) = 42
f(6) = 56

rate of change
f(4)-f(3)=10
f(5)-f(4)=12
f(6)-f(5)=14

then the average of change is 10+12+14 /3 = 12


METHOD 2 --- faster

rate of change = f(6)-f(3) / 6-3
= (36+18+2)-(9+9+2) / 3
= 36/3 = 12

5 0
3 years ago
Nadine bought 5 quarts of oil for her car. <br><br> How many fluid ounces is that?
DochEvi [55]
There are 160 fluid ounces in 5 quarts. Because there are 32 fluid ounces in 1 quart multiply that by 5 and you get 160. Your welcome!!!
6 0
3 years ago
Orange crayons are usually made in batches of 100. If it takes 22 pounds of wax to make 100 orange crayons,then how much wax wil
bogdanovich [222]

Amount of wax required for one orange crayon is 0.22 pounds.

Step-by-step explanation:

According to given statement;

22 pounds of wax = 100 orange crayons

For calculating wax for one crayon;

Wax required for one crayon = Total pounds of wax / Total no of crayons

Wax required for one crayon = \frac{22}{100}

Wax required for one crayon = 0.22

Amount of wax required for one orange crayon is 0.22 pounds.

Keywords: Crayon, Division.

Learn more about division at:

  • brainly.com/question/1949601
  • brainly.com/question/1952668

#LearnwithBrainly

7 0
3 years ago
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