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Dominik [7]
3 years ago
5

A) Mo has been rounding decimal numbers to the nearest whole number. Put a * by the correct answers and correct the incorrect an

swers. Number Rounded to Whole Number Correct (*) or Correction 7.2 7 * 8.5 8 9 12.9 13 * 3.4 3 * 11.5 11 12 9.5 9 10 b) Mo has made the same mistake throughout. Explain to Mo the mistake he has made. A:
Mathematics
1 answer:
Lesechka [4]3 years ago
8 0

Answer:

A)

7.2 7 * ⇒ correct

8.5 8 9 ⇒ 9 is the correct answer

12.9 13 * ⇒ correct

3.4 3 * ⇒ correct

11.5 11 12 ⇒ 12 is the correct answer

9.5 9 10 ⇒ 10 is the correct answer

B)

When a decimal number is 5 or more, you must round up, e.g. 4.5 must be rounded up to 5. You round down when the number is 4 or less.

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Tell whether the angles are complementary or supplementary. Then find the value of x
luda_lava [24]

Answer:

Complementary, x=78

Step-by-step explanation:

90= (x-8)+20

complementary angles add up to 90 degrees.

3 0
3 years ago
Read 2 more answers
A company that manufactures racing boats estimates that the profit for selling its brand is given by the following equation.
disa [49]

Answer:

b = 10

Step-by-step explanation:

P(b) = -25b^3 + 750b^2 + 2500b

This equation shows the income obtained based on the number of boats sold. We want to know the minimum number of boats that must be sold to obtain $ 75 000.

Then we must equalize the equation to 75 000 and clear b.

3 solutions will be obtained (because it is a polynomial of degree 3), and the lowest value will be taken.

P(b) = 75000

-25b^3 + 750b^2 + 2500b = 75000

Now we need to solve the equation, for that we seek to factor the polynomial

-25b^3 + 750b^2 + 2500b - 75000 = 0

b^3 -30b^2 - 100b + 3000 = 0 we divide the equation by -25

b^2(b-30) - 100(b-30) = 0 We take common factor b

(b^2 -100)(b-30) = 0 We take out common factor (b-30)

Finally the solutions are:

b = 30\\\\b^2 -100 = 0\\\\b^2 = 100

b = 10 and b = -10

We take the least positive solution (because you can not produce -10 boats)

Finally b = 10

The smallest number of boats that must be produced to make a profit of $ 75,000 is 10 boats.

4 0
3 years ago
Which of the binomials below is a factor of this trinomial x^2+4x+4
alexdok [17]
X^2 + 4x + 4
(x + 2)(x + 2) or (x + 2)^2
3 0
3 years ago
Can you simplify 414/4?
xxTIMURxx [149]

Answer:

207/2 or 103 and 1/2

Step-by-step explanation:

7 0
4 years ago
Read 2 more answers
Use the drop-down menus to choose steps in order to correctly solve<br> 1+2b−13=12−4b−2b for b.
alexira [117]

Answer:

b=3

Step-by-step explanation:

Given equation:

1+2b-13=12-4b-2b

Solving for b

Combining like terms on both sides.

2b+1−13=12-4b-2b

2b-12=12-6b

Adding 6b both sides to get b terms on one side.

2b-12+6b=12-6b+6b

8b-12=12

Adding 12 both sides to isolate b on one side.

8b-12+12=12+12

8b=24

Dividing both sides by 8.

\frac{8b}{8}=\frac{24}{8}

∴ b=3  (Answer)

4 0
4 years ago
Read 2 more answers
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