PLEASE HELP In right triangle ABC, ∠C is a right angle, m∠B=70∘, and AB=13.

4.42

Step-by-step explanation:

Data obtained from the question include the following:

Angle θ = 70°

Hypothenus = AB = 13

Adjacent = BC =?

Sin 70° ≈ 0.94

Cos 70° ≈ 0.34

Tan 70° ≈ 2.75

Next, we shall determine the measurement of BC as follow:

Since we are to obtain the adjacent, we shall use the following equation:

Cos θ = Adjacent /Hypothenus

Cos 70° = BC /13

0.34 = BC /13

Cross multiply

BC = 0.34 x 13

BC = 4.42

Therefore, the measurement of BC is 4.42

93.8

step-by-step explanation:

lets say, first number = x

second number = 3x+7

total = 49

(x)+(3x+7)= 49

4x+7 = 49

4x = 42

x = 42/4

x= 10.5

x= 10.5

3x+7 = 3(10.5)+7 = 93.8

hope this