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kumpel [21]
3 years ago
15

( please explain it to me!) 7. Wei's mark on a test was 39. This

Mathematics
1 answer:
Maurinko [17]3 years ago
8 0

Answer:

65

Step-by-step explanation:

Since 39 is equal to 60%, and 60% is also equal to 60/100, then 39/x (x is the total we are solving for) is equal to 60/100.

Cross multiply so 39/x = 60/100

39*100 = 60x

3900 = 60x (divide both sides by 60)

65 = x

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A golfer has two options for membership in a golf club. A social membership costs​ $1775 in annual dues. In​ addition, he would
Rainbow [258]

Answer: the golfer would need to play golf 10 times per year.

Step-by-step explanation:

Let x represent the number of times per year that the golfer need to play golf for the two options to cost the​ same.

A social membership costs​ $1775 in annual dues. In​ addition, he would pay a ​$65 greens fee and a ​$25 golf cart fee every time he played. This means that the total cost of playing golf for x times with the social membership option is

1775 + (65 + 25)x

A golf membership costs​ $2425 in annual dues. With this​ membership, the golfer would only pay a ​$25 golf cart fee when he played. This means that the total cost of playing golf for x times with the golf membership option is

2425 + 25x

For the costs to be the same,

1775 + 65x + 25x = 2425 + 25x

65x + 25x - 25x = 2425 - 1775

65x = 650

x = 10

8 0
4 years ago
In a recipe for cookies, the ratio of flour to sugar is 7:2. If the amount
emmasim [6.3K]
It would still be 7:2 because when tripled, you triple both numbers, so you get 21: 6, which is the same thing as 7:2, but you just use more. And for ratios, they usually want them to be in simplest form, so it is d) 7:2. The ratio does not change when you triple both sides.
6 0
3 years ago
Evaluate each rational expression using given values
Anestetic [448]

To evaluate an algebraic expression, you have to substitute a number for each variable and perform the arithmetic operations. In the example above, the variable x is equal to 6 since 6 + 6 = 12. If we know the value of our variables, we can replace the variables with their values and then evaluate the expression.

8 0
3 years ago
When you last balanced your checkbook, you had $463.76. You then wrote checks for $12.56, $52.11 and $26.03. You deposited $101.
Sonja [21]

Add your checks: 12.56 + 52.11 + 26.03 = 90.70

Subtract that from starting balance:

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Add the deposits:

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Your balance is correct.

Subtract your balance from the bank balance:

511.39 - 485.36 = 26.03

The difference is the amount of one of the checks you wrote, which means that check has not been cashed yet.

You did not do anything wrong.

5 0
3 years ago
A lady has 1 gallon of milk. The recipe calls for 1 quart. She dicided to triple the recipe. How many cups does she have left?
9966 [12]
1 quart= 4 cups
1 gallon= 1 quart

1 recipe= 1 quart
Tripled recipe= 3 * 1 quart= 3 quarts

Tripled recipe= 3 quarts * 4 cups per quart= 12 cups used in triple recipe

1 gallon= 16 cups

16 cups - 12 cups used= 4 cups left

Hope this helps! :)
4 0
4 years ago
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