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Alisiya [41]
3 years ago
14

Solve the system of equations below, find the sum of x and y. 2x+4y=16 3x+y=9

Mathematics
1 answer:
STatiana [176]3 years ago
5 0

y=9-3x

2x+36-12x=16

-10x=-20

x=2

y=9-3*2

y=9-6

y=3

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a swimming pool is 130 feet long and the length is 3 times the width plus 10 feet. Let x be the width of the pool. how wide is t
kondor19780726 [428]

Answer:Perimeter of a rectangle is 2*the length plus 2*the width

P = 2L + 2W and P = 130, so

L + W = 65

Three times the length is equal to 10 times the width, giving

3L = 10W

Substituting into the above for L = 65 – W,

3(65 – W) = 10W

195 – 3W = 10W

195 = 13W

W = 195/13 = 15

W = 15 yards,

And L = (10/3)W = (10/3)*15 = 50

L = 50 yards

Step-by-step explanation:

5 0
3 years ago
Find the sum of 5x3 3x²+5 and -2x²+6x²5
Alinara [238K]

Answer:

5×3=15

15+5=20

3x^2-2x^2=x^2

6x^2×5=30x^2

20+x^2+30x^2=20+31x^2

6 0
3 years ago
I need to know how do I do this in what's the answer to the question
Aleks04 [339]
Qs is outside of the circle and touches only at point s, so it is a tangent line
6 0
4 years ago
Explain how to multiply 15 3/4 x 8
max2010maxim [7]

Answer:

Step-by-step explanation:

The easiest way is to use the distributive rule. 15¾ = 15+ ¾

15¾*8 = (15+¾)8 = 15*8 + ¾*8 = 120+6 = 126

3 0
3 years ago
Can someone help with problems 22, 23 & 25
Sonja [21]

#22: 10.2 gallons for $2.59 each = 10.2 x 2.59, which rounded is $26.42.

#23: 12 pieces that are 6.45 in wide each = 12 x 6.45, which is 77.4 in.

#25: Aaron started with $38.

$22.47 + $8.53 + $6.50 is $37.50.

38.00 - 37.50 is .50 or 50 cents.


Hope that helps!

5 0
3 years ago
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