x+4+3x=72
4x+4=72
4x=72-4
4x=68
4x/4=68/4
x=17
The temperature of coffee 10 minutes after it was poured (120 F) will help in solving the constant “a”.
<span>120 = 120(2 ^ 10a) + 60 </span>
<span>2 ^ -1 = 2 ^ 10a </span>
<span>a = -1/10 </span>
<span>The temperature of coffee 30 minutes after it was poured is: </span>
<span>F = 120 ( 2 ^ -30/10) + 60 </span>
<span>F = 120 * 1/ 8 + 60 </span>
<span>F = 15 + 60 </span>
<span>F = 75</span>
Answer:
63 interest per year
Step-by-step explanation:
If one year is 7% then you want to do
7x9
7x9=63 interest per year
Answer:
m∠T = 79°
m∠V = 14°
Step-by-step explanation:
Given
As the sum of measures of the angles is 93°.
so
m∠T + m∠V = 93°
(2x + 85)° + (5x + 29)° = 93°
Remove parentheses


Subtract 114 from both sides

Simplify

Divide both sides by 7

simplify

Determining m∠T
m∠T = (2x + 85)°
substitute x = -3
m∠T = (2(-3) + 85)°
= -6 + 85
= 79°
Thus, we conclude that m∠T = 79°
Determining m∠V
m∠V = (5x + 29)°
substitute x = -3
m∠T = (5(-3) + 29)°
= -15 + 29
= 14°
Thus, we conclude that m∠V = 14°
<u>VERIFICATION:</u>
m∠T + m∠V = 93°
substitute m∠T = 79° and m∠V = 14°
79° + 14° = 93°
93° = 93°
L.H.S = R.H.S
<2 + <5 = 180 this is a straight line
<2 + 150= 180
subtract 150 from each side
<2 = 30
<2 + <3 + <4 = 180 a triangle is 180 degrees
30 + <3 + 70 = 180
100 + <3 = 180
<3 = 80