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Mekhanik [1.2K]
4 years ago
10

In Chad's reading class, all the students are reading the same book. The school bought each student a book at $7 per book. If th

ere are 27 students in Chad's class, which of the following expressions could not be used to calculate the total cost?
7(20) + 7(7), 7(30) - 7(3) 7(30) - 7(7)
Mathematics
1 answer:
Allushta [10]4 years ago
6 0
The last one 7(30)-7(7) because if you do it then it is 7(23) which doesn’t make sense because it is 27 we need to find
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Question 5 (Fill-In-The-Blank Worth 1 points)
Airida [17]

Answer:

The x-coordinate of the solution to this system of equations is <u>1</u>.

Step-by-step explanation:

Given,

6x - 5y = 5\\\\3x + 5y = 4

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Solution,

Let 6x-5y=5\ \ \ \ equation\ 1

Again let 3x+5y=4\ \ \ \ \ equation \ 2

Now using elimination method we will solve the equations.

For this we will add equation 1 and equation 2 and get;

(6x-5y)+(3x+5y)=5+4\\\\6x-5y+3x+5y=9\\\\9x=9

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6 0
3 years ago
SOS I NEED HELP ON THIS PROBLEM!!
ikadub [295]
<u>Scale - Convert to meters and reduced it to 1 cm:</u>

3 cm : 1000 cm             | GIven

3 cm : 10m                    | Convert 1000cm to 10m

1 cm: 10/3 m                 | Find 1 cm

<u>Convert the dimensions to the actual:
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7.5 cm = 7.5 x 10/3 = 25m             |  Convert 7.5cm on map to actual distance

15 cm = 15 x 10/3 = 50m               |  Convert 15m on map to actual distance²

<u>Find area of the actual pool:</u>

Area = 25 x 50 = 1250 m²              | Use the formula Area = Length x Width


Answer: 1250 m²


4 0
3 years ago
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