Answer:
+4
Step-by-step explanation:
any opposite of a natural number is created with a "minus"
- (-4) = +4
Answer:
D. 4x-3
Step-by-step explanation:
First you subtract the 7x and 3x to get 4x.
Then you subtract the -5 and the -2 to get -3
Therfore, your answer is D
Asssuming blanks are plus
5(x+1)=4(x+8)
distribute
a(b+c)=ab+ac
5(x+1)=5x+5
4(x+8)=4x+32
5x+5=4x+32
minus 4x from both sides
x+5=32
minus 5 from both sides
x=27
Answer:
The intensity on a screen 70 ft from the light is 1.728 foot candle.
Step-by-step explanation:
Given that,
The magnitude of intensity
of light varies inversely as the square of the magnitude of distance D from the source.
That is

Then,

Given that,
The magnitude of intensity of illumination on a screen 56 ft from a light is 2.7 foot-candle.
Here,
=2.7 foot-candle,
= 56 ft
=?,
= 70 ft.




foot-candle
The intensity on a screen 70 ft from the light is 1.728 foot candle.