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OLga [1]
3 years ago
12

Help if you can please!!

Mathematics
1 answer:
rosijanka [135]3 years ago
6 0
<h3>Answer: Choice (B)</h3><h3>25b^2+40b+23</h3>

===================================================

Work Shown:

c(b) = 5b

h(b) = b+4

h(c(b)) = c(b)+4 ... replace every b with c(b)

h(c(b)) = 5b+4 ... replace c(b) on the right hand side with 5b

For the sake of simplicity, let's call "h(c(b))" as k

k = h(c(b))

k = 5b+4

that way we can use it later in the next section

---------------

a(b) = b^2 + 7

a(k) = k^2 + 7 ... replace b with k

a(k) = (5b+4)^2 + 7 ... plug in k = 5b+4

a(k) = 25b^2+40b+16+7 .... use FOIL rule

a(k) = 25b^2+40b+23

a( h(c(b)) ) = 25b^2+40b+23

In that last step, I replaced k with h(c(b)) so that we get to the original format your teacher wanted.

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If the crane operator works 30 years and the train engineer works 33 years, who makes the most lifetime income? How much more?
antiseptic1488 [7]

Answer:

The train eingineer.

Step-by-step explanation:

So, to find the lifetime income, we must multiply the annual income by the years of work.

So for the cran operator:

54,830*30

=

1,644,900

Now lets compare this to the train eingineer:

50,610*33

=

1,670,130

So looking at the two numbers:

<u>1,670,130(train eingineer)</u>>1,644,900(crane operator)

So the trian eignineer makes more than the crane operator.

Now lets find the amount.

To do this, lets subtract the larger value by the smaller value:

1,670,130-1,644,900

=

<u>25,230</u>

So the train eingineer made 25,230 more dollars than the crane operator.

Hope this helps!

3 0
3 years ago
**PLS HELP! IT WOULD HELP A LOT, AND ILL GIVE BRAINLIEST!**
Inessa [10]

Answer:

she can buy 3 with a total of six dollars remaining after she bought the three video games

Step-by-step explanation:

200-134 =66

66 -60=3

6 0
2 years ago
Read 2 more answers
Jeff's salary is 25% higher than Josh's. By how many percents is Josh's salary less than Jeff's?
Sunny_sXe [5.5K]

-Hello There-

Great Question!

It is 20%. Assume Josh is 100000 and Jeff is 125000

The formula is  (Jeff-  Josh)/Jeff * 100 = (25000)/100000 *100 = 20%

Have A Great Day!

5 0
3 years ago
In the first game of the year, the modified basketball team made 63.5% of their foul shot free throws. Matthew made all 6 of his
SVETLANKA909090 [29]
So 6 shots equal 25% of the teams total shots(x)
So 6= 0.24(x)
X = 6/0.25
X= 24

If the team made 62. 5% of their shots then they missed 100% - 6.25% = 37.5 %
37.5 % of 24 = 24(0.375) = 9
4 0
3 years ago
1. What would be the depth of water of 3/4 filled rectangular pool, if pool is 10 m long, 7 m wide and 8 m deep?
Vladimir79 [104]

Step-by-step explanation:

Area if the rectangular pool= 10m×7m×8m

= 560m³

3/4 of 560m³

3/4×560

= 420

Hence , the water occupies 420m³ place

7 0
3 years ago
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