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Alex17521 [72]
2 years ago
15

ILL GIVE U BRAINLYIST IF U ANSWER. Find the solution to the system of equations below (you can do this by substitution or elimin

ation).
-4x+y=6
-5x-y=21
Mathematics
1 answer:
cricket20 [7]2 years ago
7 0

Elimination:

-4x+y=6

-5x-y=21   ...and then u add them together so its;

(the y cancelled out so its 0) x =27

plug in the 27 to any x...

-4(27) + y = 6

-108+y=6

add -108 on both sides so its...

y= -102

(27, -102)

Hope this helped :)

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What is 8 more than twice the sum of a number and 3 is the same as -6?
a_sh-v [17]
This can be solver by creating a small equation with x being the number and solving for x. The equation would be 8 + 2( x + 3 ) = -6
Solve for x:
8 + 2( x + 3 ) = -6
Distribute the 2
8+ (2x+6)=-6
Subtract 8
2x+6= -14
Add 6
2x= 8
Divide by 2
x=4

So the number you are looking for is 4

I hope this helps!
8 0
3 years ago
The college is selling tickets to the basketball ball game for $59.30 each.So far they have made $213,480 in ticket sales . How
Alex73 [517]

Answer:

<h2>3600</h2>

Step-by-step explanation:

Shift the decimals of both 213480 and 59.3 to the right by 2 decimal places. (This is needed to convert 59.3 to 5930, since long division must divide by a whole number.)

21348000÷5930

Therefore, 213480\div 59.3=3600213480÷59.3=3600.

3 0
2 years ago
F(x) =5x-8 when x=-3,0, and 4z
Akimi4 [234]

Answer:

f(3)= 5(3)-8= 15-8= 7

f(0)= 5(0)-8= 0-8= -8

f(4z)= 5(4z) - 8 = 20z - 8

7 0
3 years ago
Read 2 more answers
The cable railway was driven by a 8 foot diameter drum that turned 13 revolutions per minute. Find the linear velocity of the ca
slava [35]

Answer:

The linear velocity of the cable ≅ 327 feet per minute.

Step-by-step explanation:

Given that the diameter of the drum = 8 feet

Radius of the drum = \frac{diameter}{2}

           = \frac{8}{2}

           = 4 feet

Radius of the drum = 4 feet

1 revolution = circumference of the drum

circumference of the drum = 2\pir

where r is the radius.

So that;

circumference of the drum = 2 x \frac{22}{7} x 4

                                             = \frac{176}{7}

                                            = 25.143

circumference of the drum = 25.143 feet

The linear velocity of the cable = (13 x 25.143) feet per minute

                               = 326.859 feet per minute

The linear velocity of the cable ≅ 327 feet per minute.

8 0
2 years ago
A dog will eat 4 cups of dog kibble a day. There is 100 cups of dog food in a 50lb bag. How much dog food will a dog eat in a ye
diamong [38]
4 x 365 = 1460

1460/100 =14.6

14.5 x 50 = 760lbs
5 0
2 years ago
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