Answer:
the two numbers are 19 and 6
Step-by-step explanation:
so we know that there are two numbers that added together give us 25
x+x=25
one of the numbers is twice the amount of the second plus 7
(2x+7)+x=25
simplify 2x+7+x
3x+7=25
subtract 7 from both sides
3x=18
divide 3 by both sides
x=6
and there is your answer.
Tip:
You put the number of each equation into the form.
Exponent’s denominator goes outside
Exponent’s numerator goes inside with the number
Okay, are there any choices?
9514 1404 393
Answer:
x-intercept: (16, 0)
y-intercept: (0, 8)
Step-by-step explanation:
Each intercept is found by setting the other variable to zero and solving for the variable of interest.
I like to find the intercepts from this form because it basically involves dividing the constant by the variable coefficient.
<u>x-intercept</u>
y = 0, so we have 4x = 64 ⇒ x = 64/4 = 16
x-intercept is (16, 0)
<u>y-intercept</u>
x = 0, so we have 8y = 64 ⇒ y = 64/8 = 8
y-intercept is (0, 8)
_____
<em>Additional comment</em>
There is a form of the linear equation called the "intercept form" that looks like this:
x/a +y/b = 1
where 'a' is the x-intercept and 'b' is the y-intercept.
You can get this form by dividing the standard form equation by the constant. Here, that gives ...
4x/64 +8y/64 = 1
x/16 +y/8 = 1
This is nice because it gives both intercepts with one operation (divide by the constant). It's easy enough to do, but not always easy to explain. This form of the equation of a line is rarely seen.
Let's first convert that amount of money into cents, which makes 336 cents. Then, let's denote the amount of money one of the boys has with x. The other boy has got 3x-12 amount of money. We can construct an equation.

. Solving it we find that x=87 cents or $ 0.87 and the other boy holds $2.49 amount of money.