Answer:
10x+42>7 10x>-35 x>-3.5. x>-3.5
Step-by-step explanation:
It is given in the question that
You have already made $12 for school by selling a pie you made at a bake sale. you will earn $3 more for each additional brownie you sell.
Let the number of additional brownie is x.
Let C represents the cost function.
So C is equal to the sum of fixed cost, 12, and cost of additional x brownie.
So the required expression is
she ran 15 miles in the first month and 15 in the second but because it doubled in the third month she ran 30 miles. 15+15+30=60 miles total