8 th grade ciphering. sample evaluate 10.1 × 5.3

8th Grade Ciphering

Sample

Evaluate

10.1 × 5.3

Sample Answer

53.53

1-1

Solve

0.4x = 2x + 1.2

1-1 Answer

-0.75 or

1-2

Find the value.

(−10×5)(18)(−7+7)(−5×10)(2)

1-2 Answer

0

1-3

Solve. Express answer as decimal.

(14 +  12 −  15 −  110 +  35)2

1-3 Answer

1.1025

1-4

Simplify the expression.

(6a + 3b) - (a – 2b)

1-4 Answer

or3

1-5

Find the third side of a triangle if the perimeter is 134 and the two sides

each measure 34.

1-5 Answer

64 or 64.75

Extra 1

Solve. The quotient of a number and -3 is greater than the

quotient of 5 and 6.

Extra Answer

x < or

x < -2

2-1

The ratio of Mike’s age to his brother John’s age is 2:3. In ten years, the

ratio will be 4:5. How old is Mike?

2-1 Answer

10

2-2

Solve6 = d -

2-2 Answer

7

2-3

A cheetah can run about 5 times as fast as a squirrel. What

percent is this?

2-3 Answer

550%

2-4

If f(x) = 4x – 3 and

g(x) = 8x + 2 find f [g(-8)]

2-4 Answer

-251

2-5

Write an equation in slope-intercept form for

the line that passes through the points (-1,2)

and (5, -10).

2-5 Answer

y = -2x

Extra 2

The area of a rectangle is 432 cm² and the

length is 36 cm. What is the width?

Extra 2 Answer

12 cm

3rd Cipherer

3-1

Solve the system of equations.

x + 4y = 33y = -3x

3-1 Answer

(-3, 9)

3-2

What is the greatest number in the set

{19%, , 0.155, }

3-2 Answer

19%

3-3

Find the LCM between

18xy² and 10y

3-3 Answer

90xy²

3-4

Solve1 + y = 1.6

3-4 Answer

or 0.35

3-5

Find the area of a triangle with a base of 12 feet and a height

of 4.4 feet.

3-5 Answer

26.4 ft²

Extra 3

Roberto wants to buy a new ski jacket that costs

$96. If the total cost, including tax, is $101.28,

what is the percent of sales tax?

Extra 3 Answer

5.5%

4th Cipherer

4-1

Solve

3.14 × ()²

4-1 Answer

153.86

4-2

Evaluate if a = 3, b = 5, and c = 4.

4(2a - c³)²

4-2 Answer

13, 456

4-3

Shane’s bowling scores in five games were 124, 135, 109, 116, and 141. If the mean of Shane’s scores

after the sixth game is 130, what was his score for the

sixth game?

4-3 Answer

155

4-4

What polynomial would you add to

3y² - 4y + 2 to have a sum of 2y² + 5?

4-4 Answer

-y² + 4y + 3

4-5

Richard rowed a canoe 3 miles in hour. What is his average speed in miles per hour?

4-5 Answer

7 miles per hour

Extra 4

Convert 20 miles per gallon to

kilometers per liter

Extra 4 Answer

8.50 kilometers per

liter