1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
klio [65]
3 years ago
8

I am not sure how to even start this problem or how to write it in equation form.

Mathematics
2 answers:
algol133 years ago
8 0

let x,y,z be the 3 installments.

You will get the equations:

x+y+z = 76000

.08x + .06y + .09z = 5940

The second last sentence states:

.08x = 6*(0.6y)

which is just:

x = 4.5y

Substitute into our two equations to get:

5.5y +z = 76000

.42y + .09z = 5940

The first equation, solve for z:

z = 76000 - 5.5y

Substitute that into the second equation:

.42y +6840 - 0.495y = 5940

-0.075y = -900

y = 12000

Now back substitute our y-value back into our original equation to get:

x = 54000

z = 10000

Since x is our first installment, the answer is $54000.

Radda [10]3 years ago
3 0

Answer: first part = $54,000, second part = $12,000, third part = $10,000

<u>Explanation:</u>

             Amount Invested        Rate              Interest

Part 1             x                            0.08              0.08x

Part 2            y                            0.06              0.06y

<u>Part 3   </u>    <u>     z           </u>               <u>   0.09   </u>        <u>   0.09z</u>

TOTAL       76,000                     ******              5,940

  • Since "the interest from the first investment is six times the interest from the second part",
  • then 0.08x = 6(0.06y)
  • ⇒      0.08x  = 0.36y
  • ⇒               x = 4.5y

  • Since x + y + z = 76,000
  • then              z  = 76,000 - x - y
  • ⇒                  z = 76,000 - 4.5y - y
  • ⇒                  z = 76,000 - 5.5y

<u>Interest:</u>

0.08x + 0.06y + 0.09z = 5940

0.36y + 0.06y + 0.09(76,000 - 5.5y) = 5940

       0.42y       +        6840 - 0.495y   = 5940

                                  6840 - 0.075y   = 5940

                                            - 0.075y   = -900

                                              \frac{-0.075}{-0.075}y  = \frac{-900}{-0.075}

                                                       y   = 12,000

x = 4.5y  

x = 4.5(12,000)

x = 54,000

             Amount Invested        Rate              Interest

Part 1           54,000                  0.08              0.08(54,000) =  4,320

Part 2           12,000                   0.06              0.06(12,000) =     720

<u>Part 3   </u>    <u>    </u><u>10,000</u><u>      </u>          <u>   0.09   </u>        <u>   0.09(10,000)</u> =  <u>   900  </u>

TOTAL         76,000                  ******                                          5,940

You might be interested in
SOMEONE PLEASE JUST ANSWER THIS FOR BRAINLIEST!!!
omeli [17]

Answer:2c^2+5c+4

Step-by-step explanation:

About 92% sure this is the correct answer hun! Good luck!!

4 0
3 years ago
Write an expression to represent the product of 6 and the square of a number plus 15.
GenaCL600 [577]

Answer:

2

Step-by-step explanation:

6 0
3 years ago
NEED ANSWER FAST 11 POINTS!!!
AleksandrR [38]
Option 2 is your answer


Your numbers on the left are going across. Then the numbers on the top are going down
5 0
3 years ago
Harvey wants to buy a gift for his father that costs $35.92 and a gift for his sister that costs $52.08.He has saved $16.28.How
Gala2k [10]

Answer: $71.72

Step-by-step explanation:

6 0
3 years ago
Find Volume of a cone
liubo4ka [24]

Hence, the volume of the cone is 64.998m meters.

What is the volume of cone?

The volume of a cone defines the space or the capacity of the cone. A cone is a three-dimensional geometric shape having a circular base that tapers from a flat base to a point called apex or vertex.

Here given that,

The radius of cone is 3m and a height of a cone is 7m.

As we kow the volume of cone is \pi r^2\frac{h}{3}.

Now substitute the values in the general formula of cone then,

V=3.14(3)^2\frac{7}{3}\\\\V=3.14(9)(2.3)\\\\V=3.14(20.7)\\\\V=64.998m

Hence, the volume of the cone is 64.998m meters.

To know more about the volume of cone

brainly.com/question/1578538

#SPJ2

3 0
1 year ago
Read 2 more answers
Other questions:
  • 8z=112 solve the equation
    14·2 answers
  • 5x-3y when x=7 and y=-8
    15·1 answer
  • XY = 5x, YZ = x, and XY = 25
    10·2 answers
  • The length of a rectangle is twice its width.
    11·1 answer
  • State if the two vectors are parallel, orthogonal, or neither.<br><br> u=18i+8j<br><br> v=9i+4j
    15·1 answer
  • Prove this plzzz help me​
    8·1 answer
  • Line M contains points (4,3) and (1,2). Write a possible equation of line K that is
    11·1 answer
  • What is the solution <br><br> n/7=5
    15·1 answer
  • Samantha invited 30 friend to her birthday party. If 2 out of 3 friend invited came to the birthday party, how many friends came
    8·1 answer
  • What value of x is in the solution set of 2(3x-1) ≥ 4x-6?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!