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Strike441 [17]
2 years ago
9

Hello everyone can you help me with this problem? Please

Mathematics
1 answer:
tekilochka [14]2 years ago
4 0

Answer:

a=10.5

Step-by-step explanation:

2.25(a+1.3)=20.7\\2.25a+2.925=20.7\\-2.925\\2.25a=23.625\\

÷2.25

a=10.5

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Hippalectryon
FrozenT [24]
Add the who numbers: 4 + 2 = 6

You are correct, it's C. 6
8 0
3 years ago
What is the area of this compound shape?
Paraphin [41]

Answer:

139.36

Step-by-step explanation:

first you do 8*8 because that would be the area of the square part

8*8=64

then find the area of the semicircle

first the Radis of it is 4 because 8/2=4

A=3.14R^2/2

3.14*4^2/2

3.14*16/2

50.24/2

25.12

now because there are 3 of the semicircles you do

25.12*3

75.36

then you add the 64 from the square to get your answer

75.36+64

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6 0
3 years ago
An artist is using right triangles in her design. If all the
katovenus [111]
I think it’s C because a triangle is 180 degrees and it’s a right triangle which means there is a 90 degrees angle + 30 degrees.
90+30=120. 180-120=60
Which means the third angle is 60 degrees
3 0
3 years ago
Read 2 more answers
find the values of x and y that make these triangles congruent by the hl theorem x=2,y=3 x=-2,y=3x=3,y=2x=4,y=8
AnnyKZ [126]

Answer:

The correct option is x=3 , y=2

Step-by-step explanation:

According to the HL theorem if the hypotenuse and one leg of a right triangle are congruent to the hypotenuse and one leg of another right triangle then the triangles are congruent.

By using this theorem we can set up the system of equations as follows:

x=y+1 ...(1)

2x+3= 3y + 3 ..(2)

Now we will plug the value y+1 of equation 1 in equation 2.

2x+3 = 3y+3

2(y+1)+3=3y+3

2y+2+3=3y+3

2y+5=3y+3

Now combine the like terms:

5-3=3y-2y

2=y

y=2

Now plug the value y=2 in equation 1.

x=y+1

x=2+1

x=3

Thus the values of(x.y) are{(2,3)}

Therefore the correct option is x=3 , y=2 .....

3 0
3 years ago
three friends earned more then $200 washing cars. they paid their parents $28 for supplies and divides the rest of money equally
Allushta [10]
X is each friend
3x + 28 > 200
3x > 172
x > $57.33
5 0
3 years ago
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