Answer:
The unknown number is 34.
Step-by-step explanation:
x+5=39
x=39-5
x=34
Answer: the answer is 36
Step-by-step explanation:
we can solve this using an algebra equation
so first from the world problem, we can tell that mother and daughter's ages added together is 45 we can represent this by saying x (mother's age), plus y (daughter's age) is 45.
(x+y)=45
Then we from the problem we know that 5 years ago the product of their ages is four times the mother's age at that time. From this, we can write
(x-5)*(y-5)=4*(x-5)
Then we just subtract the common denominators which is (x-5) so then the equation becomes
(y-5)=4
add 5 to both sides
y=9
Then all we do is plug the answer for y into the very first equation
x+9=45
Subtract both sides by 9
x=36
To double-check let's put the answers in the second equation
(36-5)*(9-5)=4*(x-5)
we get
(31)*(4)=4*(31)
so it's right I think
Answer:
The measure of angle A is 53 degrees
The measure of angle B is 37 degrees
Step-by-step explanation:
Here in this question, we are interested in calculating the measure of the two angle.
When how angles are complementary, it means the sum of both equals 90 degrees
mathematically ;
(7x + 4) + (4x + 9) = 90
7x + 4x + 4 + 9 = 90
11x + 13 = 90
11x = 90-13
11x = 77
x = 77/11 = 7
The measure of angle A = 7x + 4 = 7(7) + 4 = 49 + 4 = 53 degrees
The measure of B = 4x + 9 = 4(7) + 9 = 28 + 9 = 37 degrees
Answer:
C
Step-by-step explanation:
