Answer:
sin (a+b)= sina*cosb - sinb*cosa
cos (a+b) = cosa*cosb + sina*sinb
Answer:
15 degrees, 75 degrees
Step-by-step explanation:
Call the first angle's measurement m
∠
1
.
The second angle is 5 times this, or 5
(
m
∠
1
)
.
Since the two angles are complementary (have a sum of 90
˚
), we can relate the two angles him as follows:
m
∠
1
+
5
(
m
∠
1
)
=
90
6
(
m
∠
1
)
=
90
m
∠
1
=
15
Since m
∠
2
is 5
times this, m
∠
2
=
15
×
5
=
75
.
I'M NOT TO SURE ABOUT THIS ANSWER BUT I HOPE THIS CAN HELP SOME PEOPLE.
we conclude that for 500 miles, both plans will have the same cost.
<h3>
For how many miles both plans have the same cost?</h3>
Plan A charges a fixed amount of $75, plus $0.10 per mile, so if you drive x miles, the cost equation is:
A(x) = $75 + $0.10*x
For plan B we will have the similar equation:
B(x) = $100 + $0.05*x
The cost is the same in both plans when:
A(x) = B(x)
So we need to solve the linear equation:
$75 + $0.10*x = $100 + $0.05*x
$0.10*x - $0.05*x = $100 - $75
$0.05*x = $25
x = $25/$0.05 = 500
So we conclude that for 500 miles, both plans will have the same cost.
If you want to learn more about linear equations:
brainly.com/question/1884491
#SPJ1
Hey Katie
4^2x+3 = 1
We need to solve for x
log(4^2x+3) = log (1)
Now take log of
(2x +3) * log (4) = log (1)
2x + 3 = log(1)/log(4)
2x + 3 = 0
2x = 0 - 3
2x = -3
x = -3/2
I hope that's help !