Elminate the y's
multiiply first euation by 3 and multiply 2nd equation by 2 and ad them
9x-6y=3
<u>16x+6y=4 +</u>
25x+0y=7
25x=7
divide both sides by 25
x=7/25
sub back
3x-2y=1
3(7/25)-2y=1
21/25-2y=1
note: 1=25/25
minus 21/25 fromboth sides
-2y=4/25
divide both sides by -2 (or times -1/2)
y=4/-50
y=-2/25
x=7/25
y=-2/25
(-2/25,7/25)
Answer:
Step-by-step explanation:
kira spent: 15 h TV/12 h Read so the ratio is 15/12=5/4
charlie had a ratio of 20/16=5/4
choice C , ratios are equal
Answer:
h = 4
Step-by-step explanation:
The area (A) of a trapezoid is calculated as
A = h( a + b) ← a and b are the parallel bases
here a = 5, b = 8 and A = 26, thus
h(5 + 8) = 26, that is
h × 13 = 26 ( divide both sides by 13 )
h = 2 ( multiply both sides by 2 to clear the fraction )
h = 4
Answer:
Step-by-step explanation:
The area of the triangle is = 1/2*base*height = 1/2*8*6
= 24 in2.
The area of the rectangle is = base*height = 8*4
= 32 in2.
The area of the irregular figure is = triangle + rectangle = 24+32
= 56 in2.
1/5x-g=9
1/5x=9+g
(5)1/5x=(5)(9+g)
x=45+5g