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alukav5142 [94]
3 years ago
5

Which of the following equations shows how substitution can be used to solve

Mathematics
1 answer:
maxonik [38]3 years ago
3 0

Answer:  Choice B)

2x+5(2x+3) = 3

============================================

Reasoning:

We start with the second equation 2x+5y = 3

Since y = 2x+3 from the first equation, we can replace every copy of y with (2x+3). This replacement is valid because y and 2x+3 are the same.

So that's how we go from 2x+5y = 3 to 2x+5(2x+3) = 3

This replacement is done to get rid of the y variable, and it allows us to solve for x later on.

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Sam bought a pack of
Strike441 [17]

Answer:

70% of the juice boxes are left.

Step-by-step explanation:

10 is the total number of juice boxes which means that 10 is 100%

If there are 10 total juice boxes and Sam drank 3, there are 7 juice boxes left. Sam drank 30% of the juice boxes which means that there is 70% of the juice boxes left.

Hope this helps!

3 0
3 years ago
"the quotent of a number and 4" i dont wanna fail math
Zielflug [23.3K]

Answer:

N/4

Step-by-step explanation:

quotient is the same as division

since we don't know what the number is we use n as the variable

so n/4

Hope this helps

4 0
3 years ago
The ratio of french fries to packets of ketchup in Philip's bag is 8:1. What does this mean?
Illusion [34]

Answer:

The ratio means that for every 8 fries, there is a ketchup. So if there were 16 fries, then there are 2 ketchup.

3 0
3 years ago
√(2x+1)<br> Evaluate the integral<br> 2<br> (2x + 1) In (2x + 1)<br> dx.
Crank

Substitute y=\ln(2x+1) and dy=\frac2{2x+1}\,dx, so that

\displaystyle \int \frac2{(2x+1) \ln(2x+1)} \, dx = \int \frac{dy}y = \ln|y| + C = \boxed{\ln|\ln(2x+1)| + C}

6 0
1 year ago
Why does it take 3 copies of 1/6 to show the same amount as 1 copy of 1/2?
melisa1 [442]
Because 1/2 of 6 =1/3 and 1/2×1/3=1/6
7 0
3 years ago
Read 2 more answers
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