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vlada-n [284]
3 years ago
7

What’s the answer to this question

Mathematics
1 answer:
laiz [17]3 years ago
4 0

Answer:

B

Step-by-step explanation:

3 rectangles are 3 x 7 x 2 = 42

2 triangles are 2 x 1/2 x 2 x \sqrt{2^{2} - 1^{2}   } = 2\sqrt{3}

note that you have to use Pythagoras Theorem to solve for the height of the triangle

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Solve the system by substitution<br> -4.5x-2y=-12.5<br> 3.25x-y=-0.75
gogolik [260]

Answer:

The answer to your question is: x = 1, y = 4

Step-by-step explanation:

I'll change decimals to fractions

4.5 = 9/2

12.5 = 25/2

3.25 = 13/4

0.75 = 3/4

                             -9/2 x - 2 y = - 25/2         (I)

                             13/4 x  -   y  = - 3/4            (ll)

Process

               from (II)     y = 13/4x  + 3/4

Sunstitution             -9/2x -2(13/4 x + 3/4) = - 25/2

                               -9/2 x - 13/2 x - 3/2 = -25/2

Multiply by 2         -9 x - 13 x - 3 = -25

                             -22 x = -25  + 3

                            -22 x = -22

                             x = 22/22

                            x = 1

                             y = 13/4 (1) + 3/4

                             y = 16/4

                             y = 4                                          

7 0
2 years ago
How many numbers between 100 and 999 are divisible by 4?
QveST [7]
Try this solution:
1. Note, that 100 is divisible by 4, and 999 is not divisible by it, only 996. This is an arithmetic sequence.
2. a1;a2;a3;a4;...a(n) the sequence, where a1=100; a2=104; a3=108; a4=112; ... etc., and a(n)=996. n=?
3. using a formula for n-term of the sequence: a(n)=a1+d(n-1), where a(n)=996; a1=100 and d=4 (according to the condition ' is divisible by 4'). Then 100+4(n-1)=996; ⇒ 4n=900; ⇒ n=225 (including 100).

answer: 225
7 0
2 years ago
GIVING 20 POINT AND BRAINLY
Alexus [3.1K]
Y=2x+1 is the right answer to this
5 0
3 years ago
Read 2 more answers
The steps below show the incomplete solution to find the value of m for the equation 4m − 2m + 4 = −1 + 13:
sasho [114]

Answer

B.

Step-by-step explanation

Because subtract 4 from 4 and twelve

6 0
2 years ago
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15. A movie is<br> 1 7/8<br> hours long. After 45 minutes, how much of the movie is left?
solniwko [45]

Step-by-step explanation:

67.5 minutes of the movie that was left

7 0
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