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ivolga24 [154]
3 years ago
6

Is problem 21 right?

Mathematics
1 answer:
Pepsi [2]3 years ago
5 0
Yes, the answers correct
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(14x2 - 3x3 + 9x4) - (-14 + 13x3 + 11x4) simplify and answer in standard form
FromTheMoon [43]
We have that
(14x2 - 3x3 + 9x4) - (-14 + 13x3 + 11x4)=<span>14x2 - 3x3 + 9x4 +14 - 13x3 - 11x4
</span>(14x2 - 16x3  +14 - 2x4)

then
-2x4-16x3+14x2+14=0--------------> this is the <span>standard form

simplify </span><span>dividing the entire expression by two
</span><span>-x4-8x3+7x2+7=0

the answer is 
</span>-x4-8x3+7x2+7=0<span>

</span>
4 0
3 years ago
This is the last question need answered so please help me
shusha [124]
Assuming that is a square pyramid

that is the square base+4 triangles
that is
side^2+4(1/2bh)
where b=side=14in
and h=height=13in

surface area=14^2+4(1/2)(14)(13)
SA=196+(2)(182)
SA=196+364
SA=560 square inches
6 0
3 years ago
If the area of a circle is 58 square feet, find the circumference. A. 42.5 ft. B. 4.25 ft. C. 22.35 ft. D. 26.99 ft.
PSYCHO15rus [73]

Answer: OPTION D.

Step-by-step explanation:

The formula for calculate the circumference of a circle is:

C=2r\pi

Where <em>r</em> is the radius.

The formula for calculate the area of a circle is:

A=r^2\pi

Where <em>r</em> is the radius.

Solve for <em>r</em> from A=r^2\pi to calculate it:

r=\sqrt{\frac{A}{\pi}}\\r=\sqrt{\frac{58ft^2}{\pi}}\\r=4.296ft

Subsitute the radius into C=2r\pi. Then:

C=(2)(4.296ft)\pi=26.99ft

3 0
4 years ago
Read 2 more answers
Line CD bisects AB at point C. Find AC if AB = 56 feet
RideAnS [48]

Answer:

  AC = 28 feet

Step-by-step explanation:

Point C is the midpoint of AB, so AC is half the length of AB:

  AB/2 = (56 ft)/2 = 28 ft = AC

8 0
3 years ago
WILL MARK BRAINLIEST!!!!!! 25 PTS
LuckyWell [14K]

Answer:

no

Step-by-step explanation:

SAS stands for side angle side. so in this question we know that one side is equal to another side, but we don't know wether or not there is another angle and another side that is congruent. so for that reason it is not congruent by SAS.

6 0
4 years ago
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