Answer:
c=16
Step-by-step explanation:
hello :
x2+8x+c is the perfect square means : x²+8x+c= (x+a)²
x²+8x+c = x²+2ax+a²
so : 2a=8
c=a²
a=8/2 = 4 but : c = a²
conclusion : c=16
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If she has 6 more 4 sent stamps that takes off 24 cents from the total of 114 which equals 90. 6x9=54 4x9=36
54+36=90 9+4=13. So you have 9, 6 cent stamps & 13, 4 sent stamps
To solve the problem:
<span>Let f = distance one way distance on level
ground</span>
<span>
Let h = distance rode on the hill</span>
<span>
Write a time equation; where Time = distance/speed:</span>
<span>
level time + uphill time + downhill time + level time = 1hr</span>
<span>
</span>
<span>f/9 + h/6 + h/18 + f/9 = 1 hr</span>
<span>
Multiply equation by 18 to get rid of the denominators</span>
<span>
</span>
2f + 3h + h + 2f = 18
4f + 4h = 18
Simplify by dividing this by 4
<span>f + h = 4.5 miles is took her to get to Jon’s
house.</span>
Simplify both sides
2.3=y+7.9
flip the equation.
y+7.9=2.3
Subtract 7.9 from both sides.
y+7.9-7.9=2.3-7.9
y=-5.6
hope this helps!
