Answer: Its 10 I just took the test :)
Step-by-step explanation:
How much do 777 light bulbs cost?
Question:
At the market, 5 light bulbs cost $9. How much do 7 light bulbs cost?
Answer:
Cost of 7 bulbs is $ 12.6
Solution:
Given that,
5 light bulbs cost $ 9
Find the cost of 1 bulb
Cost of 1 bulb is found by dividing the cost of 5 bulbs by 5
Thus cost of 1 bulb is $ 1.8
Thus cost of 7 bulbs is $ 12.6
Answer:
7 bulbs equals 12.6
Step-by-step explanation:
% 6.4.20
LMNP is a rectangle. Find the value of x and the length of each diagonal.
LN = 5x + 19 and MP = 8x - 8
x=0
Question:
LMNP is a rectangle. Find the value of x and the length of each diagonal.
LN = 3x + 1 and MP = 8x – 4
Answer:
Value of x = 9, Length of LN = 64, Length of MP = 64
Solution:
Given LMNP is a rectangle. LN and MP are diagonals.
LN = 5x + 19 and MP = 8x – 8
Diagonals of a rectangle are equal in length.
⇒ LN = MP
⇒ 5x + 19 = 8x – 8
Combine like terms together.
⇒ 19 + 8 = 8x – 5x
⇒ 27 = 3x
Divide by 3 on both sides of the expression, we get
⇒ x = 9
The value of x is 9.
To find the length of the diagonals.
LN = 5(9) + 19
= 45 + 19
LN = 64
MP = 8(9) – 8
= 72 – 8
MP = 64
Length of LN = 64 and the length of MP = 64.
3x + 2y + 5z = 16
7x + 3y – 4z = 11
Answer:
Step-by-step explanation:
B.) 11.0 ft^2
C.) 12.0 ft^2
D.) 5.5 ft^2
Work Shown:
L = length = 4 ft
W = width = 1.5 ft
H = height = 0.5 ft
S = surface area of rectangular prism
S = 2*(L*W + L*H + W*H)
S = 2*(4*1.5 + 4*0.5 + 1.5*0.5)
S = 17.5
The units for the surface are in square feet. This is because surface area is really the combination of all individual areas of each face.
Answer: 16m^4−25
Step-by-step explanation:
(4m^2−5)(4m^2+5)
=(4m^2+−5)(4m^2+5)
=(4m^2)(4m^2)+(4m^2)(5)+(−5)(4m^2)+(−5)(5)
=16m^4+20m^2−20m^2−25
=16m^4−25