3 years ago

(12y + 12) - 21y Simplify each expression using the properties of numbers.

Mathematics

2 answers:

Vlad [161]3 years ago

8 0

Use the commutative property..

(12y - 21y) + 12 =
-9y + 12 =
-9y = -12
y = 12/9 = 4/3 = 1 1/3

Elodia [21]3 years ago

5 0

Its 12y - 9 because when u add twelve pluus 12 it 24 then -21 is to 3 which 12 - 9 is 3

You might be interested in

What is the surface area of the prism in square inches?

astra-53 [7]

Answer:

4 inches deep, 5 inches high and 15 inches across

8 0

4 years ago

Read 2 more answers

A shirt originally cost $42.39, but it is an sale for $38.15. What is the percentage decrease of the price of the shirt? If nece

blsea [12.9K]

C. 42.39 times 0.1 is 4.239. 42.39-4.239= 38.151 which rounds to 38.15

6 0

3 years ago

The mean age of 9 women in an office is 27 years old.

Veronika [31]

26 to nearest year

We require the total of the sums of ages for both groups before calculating the mean for all 16

using mean = $\frac{sum}{count}$

Women

27 = $\frac{sum }{9}$ ( cross- multiply )

sum = 9 × 27 = 243

Men

25 = $\frac{sum}{7}$ ( cross- multiply )

sum = 7 × 25 = 175

Total sum of all 16 = 243 + 175 = 418

mean = $\frac{418}{16}$ = 26 ( to nearest year )

6 0

3 years ago

Read 2 more answers

The greenhouse club is purchasing seed for the lawn in the school courtyard. The club needs to determine how much to buy. Unfort

kiruha [24]

Answer:

The answer is 2940ft^2

Step-by-step explanation

First convert length and width to feet using the value given (7ft=1inch).

$10*7= 70$

$6*7= 42$

Multiply these values for the actual area.

$42*70= 2940$

The actual area of the lawn is 2940ft^2

7 0

3 years ago

8. Solve the formula K = 3M - 7 for M

mamaluj [8]

Answer:

m = $\frac{k + 7}{3}$

Step-by-step explanation:

k = 3m - 7

k + 7 = 3m - 7 + 7

k + 7 = 3m

$\frac{k + 7}{3}$ = m

(I'm not 100% sure fyi)

7 0

2 years ago