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Neporo4naja [7]
3 years ago
12

(-5ab+4a+4) - (2ab-1)

Mathematics
2 answers:
kaheart [24]3 years ago
7 0

Answer:

−7ab+4a+5

Step-by-step explanation:

−5ab+4a+4−2ab+1

(−5ab−2ab)+4a+(4+1)

−7ab+4a+5

kaheart [24]3 years ago
4 0

Answer:

-7ab+4a+3

Just [add/subtract] all like terms.

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What temperature is 23 degrees above freezing in fahrenheit
jek_recluse [69]
The temperature that is 23 degrees above freezing is 55 because the freezing level is 32 and you add 23 to that
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3 years ago
Roberta has $10,540 to invest. She plans to invest her money in certificates of deposit (CDs) that have 2.1% interest, a stock p
ira [324]

Answer:

The amount invested in CDs is  $1,340

The amount invested in the stock portafolio is $6,900

The amount invested in the saving accounts is $2,300

Step-by-step explanation:

Let

x ---->the amount invested in CDs at 2.1%

y ---> the amount invested in the stock portfolio at 2.5%

z ---> the amount invested in the savings account at 1.5%

x+y+z=10,540 ----> equation A

z=\frac{1}{3}y ----> equation B

substitute equation B in equation A

x+y+\frac{1}{3}y=10,540

x+\frac{4}{3}y=10,540

x=10,540-\frac{4}{3}y ----> equation C

we know that

The total interest earned by the three amount must be equal to $231.69

so

0.021x+0.025y+0.015z=231.69 ----> equation D

substitute equation B and equation C in equation D

0.021(10,540-\frac{4}{3}y)+0.025y+0.015(\frac{1}{3}y)=231.69

solve for y

221.34-0.0315y+0.025y+0.005y=231.69

0.0015y=231.69-221.34

0.0015y=10.35

y=\$6,900

<em>Find the value of x</em>

x=10,540-\frac{4}{3}(6,900)

x=\$1,340

<em>Find the value of z</em>

z=\frac{1}{3}(6,900)

z=\$2,300

7 0
3 years ago
6. Ricky earns $100.95 for working at the bakery. If he earns $14.55 per hour. How many hours
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Ricky works almost 7 hours if your rounding.
6 0
3 years ago
Read 2 more answers
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mojhsa [17]
Answer: 100 3 digit even number that begin with either 5 or 6

Explanation:
Case 1:
A 3 digit that begin with 5 should be 500-599 so there are 100 numbers
But we are only finding even number
So 100/2 = 50 3-digit even number that begin with 5.

Case 2:
A 3 digit that begin 6 should have
600-699 and there are also 100 number including even and odd in total. Since we are only finding even number we get:
100/2 = 50 3-digit even number that begin with 6.

Plus both case together we get 50 3-digit even number that begin with 5 + 50 3-digit even number that begin with 6= 50 + 50 = 100
8 0
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Answer:

it costs 7-8$ per hour

Step-by-step explanation:

the answer is estimated

8 0
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