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solniwko [45]
3 years ago
8

Use the commutative property of multiplication to rewrite 10.5.12. Which expression is equivalent? O A. 10.5.(5+5) OB. 10. 12.5

O C. (10.5) + 12 OD. 10 + 5 + 12​
Mathematics
1 answer:
valina [46]3 years ago
7 0

Answer:

b

Step-by-step explanation:

i did the math for over an hour and got the same answer 25 times

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What inverse operation should be used to isolate the variable in the equation j ÷ 12 = 50?
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Answer:

600

Step-by-step explanation:

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The diameter of a circle is 19 m. What is the circumference of the circle? Use 3.14 for pi.
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Answer:

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Step-by-step explanation:

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You invested $ 7000 between two accounts paying 3 % and 5 % annual? interest, respectively. If the total interest earned for the
natita [175]

Answer:

In the first account was invested \$3,000  at 3%

In the second account was invested \$4,000  at 5%

Step-by-step explanation:

we know that

The simple interest formula is equal to

I=P(rt)

where

I is the Interest Value

P is the Principal amount of money to be invested

r is the rate of interest  

t is Number of Time Periods

in this problem we have

First account

t=1 years\\ P=\$x\\ r=0.03

substitute in the formula above

I=x(0.03*1)

I=0.03x

Second account

t=1 years\\ P=\$(7,000-x)\\ r=0.05

substitute in the formula above

I=(7,000-x)(0.05*1)

I=350-0.05x

Remember that

The interest is equal to \$290

so

Adds the interest of both accounts

0.03x+350-0.05x=\$290

0.05x-0.03x=350-290

0.02x=60

x=\$3,000

therefore

In the first account was invested \$3,000  at 3%

In the second account was invested \$7,000-\$3,000=\$4,000  at 5%

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Please help me quickly!!??
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Step-by-step explanation:

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The solution is in the attachment

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