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nignag [31]
3 years ago
9

In the triangle above, the cosine of a is 0.8.What is sine of b?

Mathematics
1 answer:
Natalka [10]3 years ago
5 0

Answer:

sin b = 0.8

Step-by-step explanation:

Since a and b are complementary angles , then

sin b = cos a = 0.8

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During a business trip, an individual stopped at two rest stops. In the parking lot of the first rest stop, they counted 20 cars
olganol [36]

Answer

given,

on first stop

number of car = 20  and number of trucks = 18

on second stop

number of car = 18  and number of trucks = 10

we need to calculate which rest stop has higher ratio of car to truck.

Rest Stop 1

ratio= r₁ =\dfrac{cars}{trucks}

           r₁ =\dfrac{20}{18}

           r₁ =\dfrac{10}{9}

Rest Stop 2

ratio= r₂ =\dfrac{cars}{trucks}

           r₂ =\dfrac{18}{10}

           r₂=\dfrac{9}{5}

hence, r₂ > r₁

rest stop 2 has more car to truck ratio than rest stop 1

3 0
3 years ago
Solve. 3(x+1)-2x=-6
RideAnS [48]
D.)  x = - 9


C.) x = 0

Hope that helps, Good luck! (:



4 0
3 years ago
If one gallon of paint covers 825 sq. ft., how much paint is needed to cover 2640 sq. ft.
Ray Of Light [21]
3.2 gallons of paint is needed since 2640 divided by 825 = 3.2 
6 0
4 years ago
Read 2 more answers
Madeline is standing 2x- 4 feet from the base of a tree. The height of the tree is 5x + 6 feet. Find the equation that shows
kumpel [21]

Answer:

c = sqrt( 29x^2 + 44x + 52)

Step-by-step explanation:

This is an application of the Pythagorean theorem

c = sqrt(a^2 + b^2)

a = 2x - 4

b = 5x + 6

c = sqrt( (2x - 4)^2 + (5x + 6)^2 )                           Substitute and expand

c = sqrt( 4x^2 -  16x + 16 + 25x^2 + 60x + 36)     Collect like terms

c = sqrt( 4x^2 + 25x^2 - 16x + 60x + 16+36)        Combine the like term pairs.

c = sqrt( 29x^2 + 44x + 52)

This does not factor into anything very nice.

5 0
3 years ago
Read 2 more answers
Evaluate the expression y = 6 and X = 7 : x+9y
Vladimir79 [104]

Answer:

y=6,x=7

then,

x+9y

putting value

=6+9.7

=6+63

=69

4 0
3 years ago
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