MATHEMATICS MIDDLE SCHOOL

Can I please get some help on these

Answers

Answer 1

Answer:

Answer:

11. 10/9 = 80/72

12. 8/12 = 72/108

13. 22/99 = 2/9

14 4 41/123 = 4 1/3

15. 84/840 = 1/10

16. 6/14 vs 3/7 (cross multiply numerators and denominators)

42 vs 42

Therefore 6/14 = 3/7

17. 2/3 vs 5/7 (cross multiply numerators and denominators)

14 vs 15

Therefore 2/3 < 5/7

18. 1/5, 1/2, 1/4 (Change to decimals then compare)

.20 .50 .25

Therefore increasing order is1/5, 1/4, 1/2

19. 5/7, 5/6, 7/9 (Change to decimals then compare)

.71 .83 .77

Therefore increasing order is 5/7, 7/9, 5/6

Step-by-step explanation:

Related Questions

Find the edge length of a cube of 216 cube units
James correctly answered 85% of the 60 problems on his math test. how many problems did James answer correctly?
The coordinates of a square ar 1,8 7,8 7,2 ?,?
beyonce michelle and kelly shared a carton of soft drink containing 2 dozen cans. Beyonce takes 3/8 Michelle takes 5/12 and kelly takes 5./24/ How many cans does each person receive?
10.5 equal or less than 10.005

72 pint = ? Gallons. How much is the gallon?

Answers

8 pints = 1 gallon
so divide it by 8
72 pints ÷ 8 = 9 gallons

Fine the area of a circle with a radius of 7 in. Write the formula, substitute, solve.

Answers

Formula: A=(pi)r^2

Substitution: A=3.14(7^2)

A=3.14(49)

Solve: A=153.86 in^2

*I personally like to use the pi sign on my calculator to multiply the radius squared by, but my keyboard did not have a pi sign. Usually, the pi sign is more exact. If you used the pi sign, your answer would be 153.94 inches^2. Hope this helps!

Prove the identity cos(x-y)-cos(x+y)=2sinx siny

Answers

Answer:

see explanation

Step-by-step explanation:

Using the Addition/ Subtraction formulae for cosine

Consider the left side

cos(x - y) - cos(x + y)

= cosxcosy + sinxsiny - (cosxcosy - sinxsiny) ← distribute

= cosxcosy + sinxsiny - cosxcosy + sinxsiny ← collect like terms

= 2sinxsiny = right side ⇒ proven

Trapezoid JKLM is shown below.What is the length, in centimeters, of KL ?
A 12 cm
B 10 cm
C 9.cm
D 6 cm

Answers

B is the answer because you have to math it

What is the simplest form of 12/60

Answers

1/5
because if you divide it by 12, 1/5 will be your answer

the answer is 1/5 because you have to divide by 12

Evaluate 10.2x+9.4y when x=2 and y=3

Answers

Steps to solve:

10.2x + 9.4y when x = 2 and y = 3

= 10.2(2) + 9.4(3)

= 20.4 + 28.2

= 48.6

______

Best Regards,

Wolfyy :)

Answer:

48.6 is the answer

Step-by-step explanation:

Okay, first you plug in the variables x and y .

So now the new equation is 10.2x2 this is ,because everytime a number get put next to another number you multiply. So .....

(10.2x2) + (9.4x3)=

20.4+28.2=

48.6

Other Questions

A teacher offers her students 5 fake dollars to spend in the class store, when they get a perfect score on their math tests. If one of her students gets a perfect score on 4 of the math tests and already has 25 fake dollars, how many fake dollars, in total, does this student have to spend in the class store?

Erik spends $680 for cable television service. The cable company offers a deal that promises Erik 3 free months of cable if he signs a contract with them for $40 per month.

Write a real-world problem that could be represented by the expression 3(23). Then explain how you could solve the problem mentally.

1 gallon = 4 quarts1 quart = 2 pints1 pint = 2 cups1 cup = 8 ouncesHow many ounces are in 4 gallons?A) 32 ounces B) 64 ounces C) 256 ounces D) 512 ounces