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inn [45]
2 years ago
13

Example 5

Mathematics
1 answer:
Svetllana [295]2 years ago
3 0

Answer:

1/2*6(12+x)=12*x

1/2*(72+6)=12x

36+3x=12x

36=9x

4=x

Step-by-step explanation:

Check that x=4

1/2*6(4+12)=12*4

1/2*(24+72)=48

1/2(96)=48

48=48

So x=4 is the correct answer

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Cristina financed a $799 laptop with a 7.2% interest rate on a 2-year loan. If she can afford to make a $75 payment, how quickly
KatRina [158]
Your question is missing some elements but to answer the question I have to make an assumption.

Assuming that she make a monthly payment of $75.

The value of an loan at the end of the two year is given by

FV=PV(1+r)^n

where PV = $799, r = 7.2% = 0.072 and n = 2 years.

Thus,

FV=799(1+0.072)^2=799(1.072)^2=799(1.149184)=\$918.20

If she makes a monthly payment of $75, the number of months it will take her to pay off for her laptop is given by

\frac{\$918.20}{\$75} =12.24\, months

Therefore, it will take her 13 months to pay off for the laptop.
7 0
2 years ago
Solve 3 x - 9 x + 7 - 3 = -8.
erik [133]

Answer: x=2

3x−9x+7−3=−8

Step 1: Simplify both sides of the equation.

3x−9x+7−3=−8

3x+−9x+7+−3=−8

(3x+−9x)+(7+−3)=−8

−6x+4=−8

−6x+4=−8

−6x+4−4=−8−4

−6x=−12

−6x

−6

=

−12

−6

x=2


3 0
3 years ago
A train traveled 240 km in 2.5 hours and then slowed down traveling the final 180 km in 2 hours. What was the train's average sp
sesenic [268]
Average speed=Total Distance Covered\<span>Total time take<span>n
T.D=240+180=420
T.T=2.5+2=4.5
420\4.5=93.3 km\h
answer=D</span></span>
7 0
3 years ago
What two steps are necessary to put this equation into standard form?
andrew-mc [135]
X² - 3x + 27 = 8x - 3     аdd 3 to both sides  ⇒
           + 3          + 3
---------------------------
x² - 3x + 30 = 8x         subtract 8x from both sides ⇒<span>
    - 8x          - 8x
--------------------------
x</span>² - 11x + 30 = 0    ←  <span>standard form
</span>

A. Add 3 to both sides and subtract 8x from both sides.
4 0
3 years ago
Read 2 more answers
SOLVE for x. log3 8 = x
Setler [38]
You are trying so solve
<span><span>3^x</span>=8</span>
and since 8 is not an integral power of x you need a calculator.
it is <span><span>ln(8)/</span><span>ln(3)</span></span>
or
<span><span><span>log(8)/</span><span>log(3)</span></span></span>
5 0
3 years ago
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