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soldier1979 [14.2K]
3 years ago
13

What is the simplest from of this expression? (-3x^2 + 4x) + (2x^2 - x -11)

Mathematics
1 answer:
mr Goodwill [35]3 years ago
7 0

Answer:

D

Step-by-step explanation:

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Suppose $40,000 is deposited into an account paying 2.5% interest, compounded continuously.
o-na [289]

Answer:

48000

Step-by-step explanation:

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2 years ago
Solve the inequalities, if possible, and graph.
prisoha [69]

Step-by-step explanation:

a/5≥-2

a≥-10

Draw a solid circle • labelled "a" on -10 and draw an arrow from that circle towards 2.

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3 years ago
Choose the numbers that are irrational .
babymother [125]

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Step-by-step explanation:

8 0
3 years ago
A certain solar collector can absorb 9.0 MJ in 7.0 h. Another panel is added, and together they collect 41 MJ in 5.0 h. How long
Rina8888 [55]
Lets call the rate at which the first panel absorbs solar energy x:
x = 9/7

To find out how much energy the panel will absorb in a certain number of hours, just multiply x by the time:
In 7 hours, energy = (9/7) * 7 = 9MJ
In 8 hours, energy = (9/7) * 8 = (72/7)MJ

Let's call the rate at which the second panel absorbs solar energy y. Therefore, we can write an equation, in x and y, using the information in the question:
5x + 5y = 41

We know what x is, so 5x = 5 * (9/7) = (45/7):
(45/7) + 5y = 41
5y = 41 - (45/7)

41 is the same as (41*7)/7 = 287/7:
5y = 287/7 - 45/7 = (287-45)/7 = 242/7

Divide both sides by 5 to find the value of y (in MJ absorbed per hours, MJ/h):
y = 242/35 = 6.914285714MJ/h

Let's call the time taken for the new panel to absorb 41MJ t:
ty = 41

We know what y is, so substitute that in and solve:
6.914285714t = 41
t = 41/6.914285714 ≈ 5.929752066 hours

I would like to express this value in the SI unit, which is seconds, s:
5.929752066 * 3600 = 21347.1s




6 0
3 years ago
Fill in the blank 1.05 assignment
Neko [114]

Answer -4x

Step-by-step explanation:

distribute the x to 5x and -4

8 0
3 years ago
Read 2 more answers
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