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katen-ka-za [31]
3 years ago
13

Helpppp with this plssss

Mathematics
1 answer:
zavuch27 [327]3 years ago
4 0

Answer:

26.411

Step-by-step explanation:

In 3a+bc-c you have to substitute

a=8.6, b=2.3, c=0.47

3*8.6 + 2.3*0.47 - 0.47 first do the multiplication then addition and subtraction

25.8 + 1.081 - 0.47=

26.411

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A total of 1,650 boxes of Girl Scout cookies were sold last week. Each large box cost $3.50 and each small box cost $2.00. The G
s344n2d4d5 [400]

Answer:

900 large boxes were sold, and 750 small boxes.

Step-by-step explanation:

This question can be solved by a system of equations.

I am going to say that:

x is the number of large boxes of cookies sold.

y is the number of small boxes of cookies sold.

A total of 1,650 boxes of Girl Scout cookies were sold last week.

This means that

x + y = 1650

So

x = 1650 - y

Each large box cost $3.50 and each small box cost $2.00. The Girl Scout group earned $4,650.

This means that

3.5x + 2y = 4650

Since x = 1650 - y

3.5(1650 - y) + 2y = 4650

5775 - 3.5y + 2y = 4650

1.5y = 1125

y = \frac{1125}{1.5}

y = 750

x = 1650 - y = 1650 - 750 = 900

900 large boxes were sold, and 750 small boxes.

8 0
3 years ago
The ratio of the number of boys to the number of girls in a school is 5 : 7. If there are 600 students in the school, how many a
enot [183]

Answer:

350 of the students are girls.

Step-by-step explanation:

5+7 = 12

600/12 = 50

50 x 7 = 350

4 0
3 years ago
Ken has 180 model trains he stores his trains in 9 boxes each box has the same number of trains how many trains are in each box?
marshall27 [118]

Answer:

20 trains

Step-by-step explanation:

180/9 = 20

6 0
3 years ago
Heather was out for a leisurely walk at a rate of 3 miles per hour. What was her speed in yards per minute
djverab [1.8K]
88 yards per minute 1760 yards in a mile 1760x3miles =5280 Total yards 5280divided by 60 seconds = 88
4 0
4 years ago
What is the length of de?
REY [17]

Answer: length of DE = 18

Step-by-step explanation:

Since the angles of these two triangles are the same, we can assume that they are <em>similar triangles</em>. To solve for a missing side of a triangle that is similar, you can set up a proportion:

\frac{27}{15}=\frac{x}{10}

To solve for x (the missing length), you would do:

27 × 10 ÷ 15 = 18

You can set up the proportion in any way between the two triangles as long as the two sides correspond to each other. For example, you could have also used the following proportion to solve for x:

\frac{x}{27} =\frac{10}{15}

When you solve for x using this proportion, you would get the same value for x:

10 × 27 ÷ 15 = 18

3 0
3 years ago
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