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Ivanshal [37]
3 years ago
14

Solve the system using subtitions {5x-y=5 5x3y=15

Mathematics
1 answer:
denis23 [38]3 years ago
6 0

Answer:

I just googled it

Step-by-step explanation:

5 x − y = 15

Add  y  to both sides of the equation.

5 x = 15 + y

Divide each term by  5  and simplify.

x= 3 + y 5

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krok68 [10]

Answer: D

I just took the test and the answer is D.

5 0
3 years ago
Read 2 more answers
Students surveyed boys and girls separately to determine whether they wanted outdoor
vazorg [7]

Answer:

111 girls

Step-by-step explanation:

Given

Boys: Every 17 outdoor ≈ 20 indoor

Girls: 3:2 outdoor to indoor

First, we'll determine the ratio of outdoor to indoor for boys;

Recall that;

17 choose indoor while 20 choose outdoor;

The ratio of outdoor to indoor is;

20 : 17

Convert to fraction:

\frac{20}{17}

Let x represent number of boys that choose indoor when 85 boys chose outdoor;

The ratio of outdoor to indoor is;

x : 85

Convert to fraction

\frac{x}{85}

Equate both fractions

\frac{20}{17} = \frac{x}{85}

Multiply both sides by 85

85 * \frac{20}{17} = \frac{x}{85} * 85

85 * \frac{20}{17} = x

\frac{1700}{17} = x

100 = x

x = 100

This implies that when 85 chose outdoor, 100 chose indoor for boys;

Total = 100 + 85

Total = 185 boys surveyed

<em>Recall that the question says the same number of boys and girls were surveyed</em>

This implies that

Total Girls Surveyed = 185

For the girl ratio;

Outdoor to Indoor= 3:2

Number of girls that chose outdoor is as follows;

Outdoor = \frac{3}{3 + 2} * Total

Outdoor = \frac{3}{3 + 2} * 185

Outdoor = \frac{3}{5} * 185

Outdoor = \frac{555}{5}

Outdoor = 111

<em>Hence, the number of girls that chose outdoor is 111</em>

4 0
3 years ago
After jumping rope for 15 minutes, Jan took a break. If Jan took a break at 3:05 p.M., at what time did she start jumping rope?
Kitty [74]

Answer: 2 : 50 pm

Step-by-step explanation:

If Jan took a break at 3:05 pm and she had been jumping rope for 15 minutes before that, to find the time she started jumping rope, subtract 15 from the current time:

= 3:05 - 15

= 2:50 pm

<em>Jan started jumping rope at 2 : 50 pm </em>

3 0
3 years ago
A metal bar weighs exactly fifty pounds. Four students measured the weight of the bar and recorded the results. Which
blagie [28]

Answer:

A. 50.1

Step-by-step explanation:

3 0
4 years ago
Read the problem in the box below. Make a list to help you solve the problem,
romanna [79]
<h3>Answer: Choice A) 9 combinations</h3>

Explanation:

Imagine you had a table with 3 rows and 3 columns. The rows represent the possible main dishes (Chicken, Fish, Beef) and the rows represent the side dishes (Rice, Potatoes, Vegetables).

The table has 3*3 = 9 cells inside it. Each inner cell represents a different combo the customer can order.

7 0
3 years ago
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