Answer:
a = 8
b = 5
Step-by-step explanation:
<span>Let y= original side
So
A = LW
60 = (y+15)(y-13)
(y+15)(y-13) = 60
y^2 + 2y - 195 = 60
y^2 + 2y- 195 - 60 = 0
y = -17 or y= 15
Toss out the negative solution to get y= 15 as the only solution.
So the square has a side length of 15 meters.
The area of this square is 15^2 = 15*15 = 225 square meters.</span>
Answer:
55 paper plates for $4.40 is your best buy because the price for unit is $0.08
Step-by-step explanation:
First find the price for unit of each option
we have :
85 paper plates for $8.08
55 paper plates for $4.40
To find the price per unit we divide 8.08 ÷85 = .09 rounded to the nearest cent is .10
and 4.40 ÷ 55 = .08
Therefore, the best buy is $.08 or 55 paper plates for $4.40
Answer:
x=1/6
Step-by-step explanation:
1/2-1/3=x
x=1×3-1×3/6 [ take l.c.m]
x=3-2/6
x=1/6 .
(a) Find the linear equation that relates the temperature t and the number of chirps per minute n.
If the equation is linear, then the equation should have the form of t = mn + b
m = (80 - 70) / (168 - 120) = 5/24
t = 5/24n + b
70 = 5/24(120) + b
b = 45
t = 5/24 n + 45
<span>(b) If the crickets are chirping at 138 chirps per minute, estimate the temperature. (Round your answer to the nearest degree.)
</span><span>t = 5/24 n + 45
</span><span>t = 5/24 (138) + 45 = 74 </span>°F
