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mart [117]
4 years ago
15

Please help me! I'm really stuck!

Mathematics
1 answer:
tatyana61 [14]4 years ago
6 0

Answer:

13.6

Step-by-step explanation:

This is pythagoras theorem its c2 = a2+b2

13 squared + 4 squared is 185

the square root of 185 13.601

then rounded is 13.6

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Problem is in the pictures
marta [7]

Answer:

<h2>(-5, 3)</h2>

Step-by-step explanation:

\left\{\begin{array}{ccc}6x+3y=-21&\text{divide both sides by (-3)}\\2x+5y=5\end{array}\right\\\underline{+\left\{\begin{array}{ccc}-2x-y=7\\2x+5y=5\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad\qquad4y=12\qquad\text{divide both sides by 4}\\.\qquad\qquad y=3\\\\\text{Put it to the second equation:}\\2x+5(3)=5\\2x+15=5\qquad\text{subtract 15 from both sides}\\2x=-10\qquad\text{divide both sides by 2}\\x=-5

3 0
3 years ago
Which of the following are always classified as a trapezoid? Select all that apply.
Zarrin [17]
C d e anything with 4 sides
6 0
3 years ago
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Can someone please help me with this one this is confusing to me :’) tysm!
AlekseyPX

Answer: 125 centimeters

1,250 millimeters

Step-by-step explanation:

'centi' means hundred. 100 centimeters go into a meter.

'milli' means thousand. 1,000 millimeters go into a meter. Easy math from there.

6 0
3 years ago
Read 2 more answers
A rectangle is 2 feet longer than it is wide. If the area is 8 square feet, find its perimeter.
MrMuchimi

Answer:

12 feet

Step-by-step explanation:

w = width

w+2 = length

w(w+2) = 8

w² + 2w - 8 = 0

(w+4)(w-2) = 0

w = -4   <em>exclude because a length cannot be negative</em>

w = 2

length = 2+2 or 4

P = 2(2)+2(4)

P = 4+8 or 12

8 0
3 years ago
Kindly tell me the answers of these three
Ghella [55]

Answer:

1) -4/5,3 Decimal form x= -0.8,3

2) ?

3)sq (x+2)(x+3)+sq x^2 +5x-4=0

Step-by-step explanation:

Hope this helps

3 0
4 years ago
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