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Arlecino [84]
3 years ago
8

4(x+5)+4x+8

Mathematics
2 answers:
kvasek [131]3 years ago
6 0
B.) 8(x+4) is the best choice
elena55 [62]3 years ago
4 0

Answer:

A.)  4(2x + 7)

Step-by-step explanation:

4(2x + 7)

4(x + 5) + 4x + 8

4x + 20 + 4x + 8

8x + 28

4(2x + 7)

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Increase 90 in the ratio 6:5​
mash [69]

Answer:

108

Step-by-step explanation:

x:90 = 6;:5

x/90=6/5

x=108

6 0
2 years ago
An Electrician charges $30 for a service call plus $75 per hour of service. If he charged 210 how many hours did he work?
andreyandreev [35.5K]
30 + 75x= 210
Subtract 30 from both sides
75x=180
Divide both sides by 75
X =2.4

Worked 2.4 hours
3 0
3 years ago
An investment of ​$100 comma 000 was made by a business club. The investment was split into three parts and lasted for one year.
Artist 52 [7]

Answer:

  • $54000 was invested at​ 8% interest
  • $36000 was invested at​ 6% interest
  • $10000 was invested at​ 9% interest

Step-by-step explanation:

Total Investment = ​$100,000

The investment was split into three parts (say x, y and z)

  • x+y+z=100000

Simple Interest = Principal X Rate/100 X Time

The first part of the investment earned​ 8% interest

Interest on the first part = 0.08x

The second part of the investment earned​ 6% interest

Interest on the second  part = 0.06y

The third part of the investment earned​ 9% interest

Interest on the third part = 0.09z

Total interest from the investments = $ 7380.

Therefore:

0.08x+0.06y+0.09z=7380

The interest from the first investment was 2 times the interest from the second.

0.08x=2 X 0.06y

0.08x=0.12y

Substituting we have:

0.12y+0.06y+0.09z=7380

0.18y+0.09z=7380

From 0.08x=0.12y

x=1.5y

Substituting x=1.5y into x+y+z=100000

1.5y+y+z=100000

2.5y+z=100000

z=100000-2.5y

Substituting z=100000-2.5y into 0.18y+0.09z=7380

0.18y+0.09(100000-2.5y)=7380

0.18y+9000-0.225y=7380

-0.045y=-1620

Divide both sides by -0.045

y=36000

Recall: x=1.5y

x=1.5 X 36000

x =54000

x+y+z=100000

54000+36000+z=100000

z=100000-(54000+36000)

z=10,000

Therefore:

  • $54000 was invested at​ 8% interest
  • $36000 was invested at​ 6% interest
  • $10000 was invested at​ 9% interest
3 0
3 years ago
Thirteen people are entered in a race. If there are no ties, in how many ways can the first three places be awarded?
Leni [432]

Answer:

666.888.000.333

Step-by-step explanation:

yeah I said what I said

bye

5 0
1 year ago
Find the function value. tan 240°
ivanzaharov [21]

Answer:

Step-by-step explanation:

240 has a reference angle of 60 in the third quadrant. The side across from 60 is going to be negative in this quadrant, measuring -√3; the side adjacent to the angle is also negative in this quadrant, measuring -1. The tangent ratio is the side opposite the angle over the side adjacent to the angle, so

tan(240) = √3

7 0
2 years ago
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