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Zina [86]
4 years ago
12

salina and nessa combined like terms using the same expression salinas answer differs from nessas the table shows both of their

solutions

Mathematics
2 answers:
igor_vitrenko [27]4 years ago
7 0

Answer: A

Step-by-step explanation:

lisov135 [29]4 years ago
6 0

Answer:

A

Step-by-step explanation:

Consider the expression

6x^2y-3+x^2y+2xy^2+2xy-6

which both girls are given.

In this expression there are like terms:

  • 6x^2y and x^2y;
  • -3 and -6.

Combine the like terms:

6x^2y+x^2y=7x^2y;

-3+(-6)=-9

So,

6x^2y-3+x^2y+2xy^2+2xy-6=7x^2y +2xy^2+2xy-9

Correct option is A, Salina combined the x^2y terms correctly, but then left +x^2y term in her answer.

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67000000 in scientific notation
yan [13]

Answer:

6.7 * 10^7

Step-by-step explanation:

7 0
4 years ago
Please help!!!
ehidna [41]

Answer:

Volume = 3.15 cm³

Step-by-step explanation:

mass = 5 gram

density = 1.59 g/cm³

now

density = mass/ volume

or, 1.59 = 5/v

or, v = 5/1.59

so, v = 3.15 cm³

4 0
3 years ago
A bicycle store costs $3250 per month to operate. The store pays an
ANEK [815]

Answer:

65 bikes

Step-by-step explanation:

The store buys the bikes that they sell for $35, and they sell them for $85, so in order to find the actual amount of money earned from one sale, you have to subtract how much they sell the bikes for by how much they bought them for, so:

85 - 35 = 50

Then, you divide the $3250 by the 50:

3250 / 50 = 65

So now we know that the store must sell 65 bikes a month to break even.

8 0
3 years ago
A retired woman has $280,000 to invest. She has chosen one relatively safe investment fund that has an annual yield of 9% and an
ASHA 777 [7]

Answer:

9% fund: $ 210,000

13% fund: $70,000

Step-by-step explanation:

As she wants to have a $28,000 annual return for her $280,000 investment, she is expecting a return rate of 10%:

r=\dfrac{R}{C}=\dfrac{28,000}{280,000}=0.10

If we call x the proportion of the capital in the 9% fund, then (1-x) is the proportion of the capital in the 13% fund,and the return of the combination has to be the expected return of 10%:

0.09x+0.13(1-x)=0.10\\\\0.09x+0.13-0.13x=0.10\\\\-0.04x=0.10-0.13=-0.03\\\\x=\dfrac{0.03}{0.04}=0.75

Then, we know that 75% of the capital should be invested in the 9% fund and 25% in the 13% fund.

This correspond to a capital of:

9% fund: 0.75*$280,000 = $ 210,000

13% fund: 0.25*$280,000 = $70,000

6 0
4 years ago
Ann's car can go 238 miles on 7 gallons of gas. During a drive last weekend, Ann used 4 gallons of gas. How far did she drive? E
Andru [333]

Answer:

its c 320+56

Step-by-step explanation:

4 0
3 years ago
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