3 years ago

Which expression is equivalent to 3(m+ 2) − 4(2m− 9) HELP ASAP

Mathematics

1 answer:

QveST [7]3 years ago

8 0

3(m + 2) - 4(2m - 9)
= 3m + 6 - 8m + 36
= 3m - 8m + 6 + 36 (now, we will group like terms).
= -5m + 42.

You might be interested in

Round 27,141 to the nearest ten

Wittaler [7]

27, 140 is the correct answer

4 0

3 years ago

A 3650-year-old wooden chest is found by archaeologists. What percentage of the original Superscript 14 Baseline Upper C would

AfilCa [17]

Answer:

64.5%

Step-by-step explanation:

Initial amount N° = ?

Remaining amount after decay = N = ?

k = decay constant = 0.00012 $yr^{-1}$

t = time = 3650 year

fraction remaining will be N/N°

From the decay equation, N = N° $e^{-kt}$

N/N° = $e^{-kt}$

N/N° = $e^{-0.00012 x 3650 }$

N/N° = $e^{-0.438}$

N/N° = 0.645 = 64.5%

6 0

3 years ago

Zoe counts 5 times as many black kittens as white kittens for sale at the pet store. she counts a total of 25 kittens how many m

malfutka [58]

Let us say that:

a = black kittens

b = white kittens

We know that:

a = 5 b

a + b = 25

Therefore:

5 b + b = 25

6 b = 25

b = 4.17

But we cannot have a fraction value for the number of kittens, so round off:

b = 4

So a is:

a = 25 – 4 = 21

<span>Hence Zoe counts additional 1 black kitten.</span>

3 0

3 years ago

HELP PLEASE!! 13 Points Offered

Sholpan [36]

Answer:

C: 124

Step-by-step explanation:

If you look at the angle it has to be over 90 degrees so therefore your only option is C: 124.

4 0

3 years ago

Solve by factoring: 2x2 - 5x - 12 = 0

Zepler [3.9K]

Step-by-step explanation:

$2 {x}^{2} - 5x - 12$

$2 {x}^{2} - 8x + 3x - 12$

$2x(x - 4) + 3(x - 4)$

$2x + 3 = 0 \: \: x - 4 = 0$

$x = \frac{ - 3}{2} \: \: x =4$

5 0

3 years ago

Read 2 more answers