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arlik [135]
3 years ago
8

Thirty-five more than .8 times a number is the same as 43 less than the product of -7 and the number

Mathematics
1 answer:
nydimaria [60]3 years ago
4 0

Answer:

0.8x + 35 = -7x - 43

The number is -10.

Step-by-step explanation:

Let x = the number.

0.8x + 35 = -7x - 43

7.8x = -78

x = -10

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-2x + 3 is your answer.

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Point A is at (3, 2.7) and point B is at (3, 1.4) on a coordinate grid. The distance between the two points is ____.
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5 0
3 years ago
You invested a total of $9,000 at 4 1/2 % and 5% simple interest. During one year, the two accounts earned $435. How much did yo
KonstantinChe [14]

Answer:

The amount invested at 4.5% was \$3,000

The amount invested at 5% was \$6,000

Step-by-step explanation:

we know that

The simple interest formula is equal to

I=P(rt)

where

I is the Final Interest Value

P is the Principal amount of money to be invested

r is the rate of interest  

t is Number of Time Periods

Let

x -----> the amount invested at 4.5%

9,000-x -----> the amount invested at 5%

in this problem we have

t=1\ year\\ P1=\$x\\ P2=\$(9,000-x)\\I=\$435\\r1=0.045\\r2=0.05

substitute

435=x(0.045*1)+(9,000-x)(0.05*1)

435=0.045x+450-0.05x

0.05x-0.045x=450-435

0.005x=15

x=\$3,000

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9,000-x=\$6,000

therefore

The amount invested at 4.5% was \$3,000

The amount invested at 5% was \$6,000

5 0
4 years ago
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