Answer:
Step-by-step explanation:
Let's solve your equation step-by-step.
−19=b−6
Step 1: Flip the equation.
b−6=−19
Step 2: Add 6 to both sides.
b−6+6=−19+6
b=<em>−13</em>
Answer:
a is the correct option.
Step-by-step explanation:
We have been given the population model is 
Here x represents number of weeks and f(x) is population of frog after x weeks.
For x= 6, we have

It means that the population after 6 weeks is 960.
Hence, f(6)=960 represents the population after 6 weeks.
a is the correct option.
Step-by-step explanation:
Solving
2x + 6 = 4x - 4
Bringing like terms on one side
6 + 4 = 4x - 2x
10 = 2x
10 / 2 = x
5 = x
The rate of interest is 25%
<u>Explanation:</u>
Given:
Principal, P = $2,000
Amount, A = $2500
Time, t = 1 year
Rate of Interest, r = ?
We know:

On substituting the value we get:


Therefore, the rate of interest is 25%
<span><span>250+250</span>−<span>(<span>3+4</span>)</span></span><span>=<span>493
There you go hope this helped</span></span>