Answer:
6*13+6*7=6*(13+7)
Step-by-step explanation:
The distribitive propierty states that the multiplication of a number by a sum is equal to the sum of the multiplications of that number by each of the addends:

Hence:

It is the D answer.
Even though I cannot see the second equation, I know that this must be it. It is the only set of equations that properly states that she must work less than 15 hours combined (b + t)
Answer:
D: 4(2a+3)=8a+3
Step-by-step explanation:
4x2a = 8a and 4x3 = 12
We have two numbers say a, b. And a system of equations.

It looks a bit intimidating but it's actually very easy.
Instead of term a + b in the second equation we can say it's zero because the first equation describes a + b as being equal to 0.
So,

The above equation is not true therefore numbers a and b do not exists in the real number domain.

No solution.
Hope this helps.
Answer:

Step-by-step explanation:
The equation of a line in slope-intercept form:

m - slope
b - y-intercept → (0, b)
We have the x-intercept = 4 → (4, 0), and y-intercept = 5 → b = 5.
Therefore we have the equation:

Put the coordinates of x-intercept to the equation:
<em>subtract 4m from both sides</em>
<em>divide both sides by (-4)</em>

Finally we have the equation of a line if slope-intercept form:

The standard form:

Convert:
<em>multiply both sides by 4</em>
<em>add 5x to both sides</em>
