Answer:
14) 21.136505024965 m
15) 43.076759215619 km
Step-by-step explanation:
14)
let h be the height of the lighthouse:
tan(41.3) = 18.7/h
Then
h = 18.7÷tan(41.5)
= 21.136505024965 m
………………………………………
15)
90-71.4 =18.6
Let s be the distance that the plane flew
towards the south:
tan(90 - 71.4) = s/128
Then
tan(18.6) = s/128
Then
s = tan(18.6)×128
= 43.076759215619 km
Answer:
18
Step-by-step explanation:
because 20% of 90 is 18
Answer:
Constants are the terms in the algebraic expression that contain only numbers. That is, they're the terms without variables. We call them constants because their value never changes, since there are no variables in the term that can change its value.
An algebraic expression is one or more algebraic terms in a phrase. It can include variables, constants, and operating symbols, such as plus and minus signs.
Step-by-step explanation:
Answer:
20
Step-by-step explanation:
We can tell from the little square in the corner that this is a 90 degree angle, so all three of the expressions of x should add up to 90:
x + 2x + (x + 10) = 90
Combine like terms:
4x + 10 = 90
4x = 80
Divide by 4:
x = 80/4 = 20
The answer is 20.
Hope this helps!
