Write two subtraction equations to show how to find 15 - 7

Solution:

We need to find 15-7 using two subtraction equation.

First we split 15 and 7 as addition form.

Split 15 = 10 + 5

Because sum of 10 and 5 is 15

Split 7 = 5 + 2

Because sum of 5 and 2 is 7

Now we substitute into original expression.

(10 + 5) - (5 + 2)

Now we open the parentheses

10 + 5 - 5 - 2

We can see two positive number and two negative number.

Now we move one positive and one negative number together

10 - 5 + 5 - 2

Now we close in parentheses.

(10 - 5) + (5 - 2)

Two subtraction equation:

10-5  and  5-2

answer: a and c are correct

step-by-step explanation:

the +5 is the vertical translation

the added negative symbol in front is the reflection over the y-axis

on a coordinate grid, point a is at (−4.0, −2.4) and point b is at (4.0, −2.4). point b is a reflection of point a across the –axis. input either a lowercase x or i think is the right awnser

step-by-step explanation: