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liraira [26]
3 years ago
8

Help with question 9 please:)

Mathematics
1 answer:
OLga [1]3 years ago
7 0

Answer:

4.2

Step-by-step explanation:

First you use the cylinder formula 2 times pi times radius squared plus 2 times pi times radius times height. If you plug it in which is 2 times .8 squared plus 2 times pi times .8 times 1.8 you get 13.0689. Then you multiply that by three because there are three tanks and you get 39.2067. After that you subtract 35 because there are seven tins of paint and they each cover five meters and you get 4.2067. The final answer is No he doesn't have enough paint to cover it completely because he has 4.2 meters left to cover (don't forget to round 4.2067). Here is the work sorry about the picture I took it with my laptop not my phone sorry :). But I hope this helps.

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Please help<br><br>numbers 42, 43, 44
Aleks [24]
<h3>Answer:</h3>

42.  29°

43.  3x³ +2x² -3x +10

44.  20a² +68a

<h3>Step-by-step explanation:</h3>

42.  The right-angle corner tells you the two marked angles are complementary — they sum to 90°.

  (-3x +20)° + (-2x +55)° = 90°

  -5x +75 = 90 . . . . . . . . . . collect terms, divide by °

  -5x = 15 . . . . . . . . . . . . . . . subtract 75

  x = -3 . . . . . divide by the coefficient of x

The angle of interest is (-3x+20)°. Filling in the found value for x, we have ...

  (-3·(-3) +20)° = 29° = m∠BDC

___

43.  The distributive property is useful for multiplying polynomials.

  (x +2)(3x² -4x +5) = x(3x² -4x +5) +2(3x² -4x +5)

  = 3x³ -4x² +5x +6x² -8x +10 . . . . . eliminate parentheses

  = 3x³ +2x² -3x +10

___

44.  Area is the product of length and width, so this becomes a problem in multiplying polynomials.

  area = (5a +17)(4a) = 20a² +68a . . . . area in square feet

3 0
3 years ago
The radius of a basketball is about 3.6 times greater than the radius of a tennis ball. How many times greater is the volume of
Strike441 [17]

The basketball is 46.656 greater than the tennis ball

That is the answer

8 0
3 years ago
Need help asap pllzzz will give brainliest
Greeley [361]

Answer:

d. $350.00

Step-by-step explanation:

A constant is a number that does not have any variables. The additional cost would depend on the number of persons at attendance so the cost would be $10.00p which is not the constant here. Thus, $350.00 is the only constant in this situation.

4 0
3 years ago
20% of dash is equal to 140M
AlexFokin [52]

ANSWER: The length of the entire dash is 700 meters.

EXPLANATION:

Because 20% of the dash equals 140 meters, we can use a variable to figure out the length of the entire dash.

Let x be the length of the entire dash.

.2x = 140\\\\x = 700

The length of the entire dash is 700 meters.

7 0
3 years ago
The measure of one of the acute angles in a right triangle is 59°.
Over [174]

Answer:

31*

Step-by-step explanation:

right triangle means 90* so 90*-59* = 31*

6 0
2 years ago
Read 2 more answers
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