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Alexeev081 [22]
3 years ago
13

Answer question below.

Mathematics
2 answers:
san4es73 [151]3 years ago
4 0

Answer:

The third one.

Step-by-step explanation:

The square root of 81 is 9. The closest answer to that is the third one.

Papessa [141]3 years ago
4 0

Answer:

x is between 80 and 90

Step-by-step explanation:

Square both sides

x= 9^2, so 9*9

x=81

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Solve the system by substitution:<br> y = -3x + 10<br> y=-3x + 4<br> Please show the steps!
sergiy2304 [10]

Answer:

x=1, y=7

Step-by-step explanation:

y = -3x + 10 - first equation

y=-3x + 4 - second equation

rearrange the expression to

-3x-y= -10

3x-y= -4

pick an equation and simplify; lets pick the second equation

3x-y= -4

\frac{3x}{3} = \frac{-4+y}{3}  

divide 3 by both sides

x= \frac{-4+y}{3} - third equation

substitute the value of x into an equation; lets pick the first equation

-3x-y= -10

-3(\frac{-4+y}{3})- y = -10

simplify. -3 cancels 3 so we are left with

-1(-4+y)-y = -10

simplify

4-y-y= -10

4-2y= -10

subtract 4 from both sides

-2y= -10-4

-2y= -14

divide -2 by both sides

y=7

substitute the value of y, (y=7) in an equation, we are using the second equation

3x-y= -4

3x-7= -4

3x = -4+7

3x= 3

divide 3 by both sides

x=1

so the answer is x=1, y=7

5 0
3 years ago
Given a:b and b:c, find a:b:c. Write the ratio in simplest form. a:b=6:10 and b:c=21:33
kherson [118]

Answer:

a:b = 6:10 = 3:5 = 21:35

b:c = 21:33 = 7:11 = 35:55

a:b:c = 21:35:55

7 0
3 years ago
A number s is no more than 18<br><br>PLEASE PLEASE PLEASE HELP ME
defon

Answer:

x \leqslant 18

8 0
3 years ago
Can someone please help me with this
solmaris [256]

Step-by-step explanation:

sum of all angles = 360

7x-4 = 360

7x= 364

x = 52

angle j = 150

angle k = 62

angle m = 100

8 0
2 years ago
Solve the triangle: a = 25, c = 25, B = 25°. If it is not possible, say so.
ikadub [295]
B= 10.822
A= 77.5 degrees
C= 77.5 degrees
7 0
3 years ago
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