Roberta is thinking about joining the food co-op store. if she pays $10.00 to join, she will get 10% off on all the groceries she buys there. how much must she buy before her savings equal her membership fee?

She must buy groceries of worth $100.00

Step-by-step explanation:

The membership fees of food co-op store = $10.00

After joining Roberta will get 10% off on all the groceries she buys here.

She wants to buy items so that her savings must be equal to her membership fee.

Let the amount of groceries that she wants to buy be 'x'

Therefore, equation will be

10% × x = $10

0.10 × x = $10

x = 10 ÷ 0.10 = $100

Roberta must buy the items worth $100, so that her savings would be equal to her membership fee.

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b