Can someone please help me with this math question please. Please

9514 1404 393

  14. (x, y) = (1, 3)

  15. $6200

Step-by-step explanation:

14. Substitution is a nice strategy for this one, since we have an expression for y. Using the second equation in the first, we get ...

  4x +(2x+1) = 7

  6x +1 = 7 . . . . . . . collect terms

  6x = 6 . . . . . . . subtract 1

  x = 1 . . . . . . . divide by 6

  y = 2(1) +1 = 3 . . . . substitute for x in the second equation

The solution is (x, y) = (1, 3).

__

15. The formula for the balance when the investment earns simple interest is ...

  A = P(1 +rt)

where P is the principal invested, r is the annual rate, and t is the number of years.

For the given values, we find the account balance to be ...

  A = $5000(1 +0.04·6) = $5000·1.24 = $6200

Jacob will have $6200 in his account after 6 years.

isi

step-by-step explanation:

use that smart brain

d

step-by-step explanation:

hello and welcome!

so, when we see the words "proportional" along with a table, we need to know that we're looking numbers that divide by the same thing.

looking at this table, we simply have to do a trial and error, and divide to see which numbers have the same quotient. if you look at choice a & c, they both have equal quotients for three of the numbers, with one exception, so those can't be the answer. looking at b, there is no similarity, so that can't be it. then, we see d; if you divide all the numbers in the table, you'll see that they all divide by two, which is a proportional relationship, and our answer!

also, always remember that the x will always be the number that goes into y, and somewhere behind this table, is a formula. for this specific table, the formula would be:

since our x-value is being divided by two to get the y-value. and if they were to ask for more numbers in the series, this is the formula you would use to find them.