Answer:
expanded : 3a + 9 + 2a answer: 5a + 9
Step-by-step explanation:
so 3*a = 3a and 3*3 = 9 + 2a
3a + 9 + 2a
5a + 9
Blue beads: 100/130, which reduces to 10/13.
Red beads: 20/130, which reduces to 2/13.
You're just taking the fraction of the certain color of beads compared with the total number of beads, which is 130.
Answer:
120%
Step-by-step explanation:
From the question, 50 people were called and 60 people came
what this mean is that 10 extra people came
Initially, the 50 out of the 60 represented the first 100%
Now, for the 10, what we have to do is to find the percentage of 50 that is 10
We have this as;
10/50 * 100 = 20%
Now, we add this to the initial 100%
So we have 100 + 20 = 120%
Answer:
16%
Step-by-step explanation:
78 + 90 + 48 + 87
= 303
48÷(300%)=16
Answer:
a= 20
Step-by-step explanation:
We can use the Pythagorean theorem to solve
a^2+b^2 = c^2 where a and b are the legs and c is the hypotenuse
The diagonal is the hypotenuse and the length and width are the legs
a^2 + 15^2 =25^2
a^2 +225 = 625
Subtract 225 from each side
a^2+225-255=625-225
a^2 = 400
Take the square root of each side
sqrt(a^2) =sqrt(400)
a = 20
