Elena used math facts as an anchor to find the sum of 5 and
7. her work is shown.
in which step did her first error occur?
step 1: the phrase "sum of means addition,
step 2: 5 + 5 = 10
step 3: since 7 is 2 more than 5, 2 more need to be added to
10.
step 4: therefore, 5+ 7 = 8.
step 1
step 2
step 3
step 4

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)

maybe i can

18.75 gallons

step-by-step explanation: