11. 10^-8 = 1 • 10^-8 in decimal form
12. 6 • 10^-4 = 0.0006 in decimal form
13. n^m turns into 5^4
5 • 5 • 5 • 5 = 625
5^4 = 625
Answer:
Step-by-step explanation:
21. (24)(2)/6+4=48
=48/6+4
=8+4
=12
Angle 1 = 8x + 45
Angle 2 = x
x + 8x + 45 = 180
combine like terms
9x + 45 = 180
subtract 45 from both sides
9x = 135
divide both sides by 9 to isolate x
x = 15
Angle 1 = 8(15) + 45 = 165 degrees
Angle 2 = 15 degrees
The numbers of pears and apples bought are 16 and 20 respectively
let
x = number of pears
y = number of apples
He bought 4 more apples than pears. Therefore,
He bought a number of pears and apples and paid $128 for them. Therefore,
<h3>System of equation:</h3>
y - x = 4
4y + 3x = 128
Therefore,
3y - 3x = 12
4y + 3x = 128
7y = 140
y = 140 / 7
y = 20
Therefore,
20 = x + 4
x = 20 - 4
x = 16
learn more on algebra here: brainly.com/question/971162
