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AnnZ [28]
2 years ago
14

How to figure it out

Mathematics
1 answer:
harkovskaia [24]2 years ago
8 0
Have
.5x+.10y+.20z=380
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4x + 3y = 22<br> 5x - 4y = 43<br> Simultaneous Equation
oksano4ka [1.4K]

Answer:

x = 7

y = -2

Step-by-step explanation:

4x + 3y = 22  ---------------------(I)

5x - 4y = 43 ---------------------(II)

Multiply(I) by 4 and equation (II) by 3. And then add the equations

(I) * 4            16x + 12y = 88

(II) *3            <u>15x  - 12y = 129</u>   {Add & thus y will be eliminated}

                    31x         = 217

x = 217/31  

x = 7

Plug in the value of x in equation (I)

4*7 + 3y = 22

28 + 3y = 22

       3y = 22 - 28

       3y = -6

         y = -6/3

y = -2

4 0
3 years ago
Find the volume of the cylinder.
alexandr1967 [171]
V= area of the base • height
V= pi• radius^2 •height
V= (3.14• 5^2) • 3
(3.14•25)•3
=235.5 units cubed
6 0
2 years ago
Express 20 hours at the percentage of 10 days pllzzzz
Oliga [24]

Step-by-step explanation:

a day =24hrs so 10 days=240hrs

20hrs/240hrs ×100%to get the percentage

20/240×100%=8 1/3

6 0
2 years ago
Read 2 more answers
Myranda received a movie gift card for $100 to her local theater Matinee tickets cost $7.50 each and evening tickets 12.50 each
Rama09 [41]

Answer:

Divide them both by 100

Step-by-step explanation:

3 0
2 years ago
A wire attached to the top of a pole reaches a stake in the ground 20 feet from the foot of the pole and makes an angle of 58° w
Finger [1]
It is a right triangle
cos 58 = 20/length of rope
length of rope = 20/cos 58 degrees
= 37.74 feet
6 0
3 years ago
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