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mina [271]
3 years ago
10

seventy percent of the 100 students in a middle school cafeteria bought their lunch. Some of the students that bought their lunc

h leave the cafeteria to attend an assembly. Now only 60% of the remaining students bought their lunch. How many of the students are remaining in the cafeteria?
Mathematics
1 answer:
MAVERICK [17]3 years ago
6 0

100% -60% is equal to 40%

so 40% of the students remained in the cafeteria

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Factorise completely (2x+1)^2 -(x-1)^2
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Use photomath ! It's an app that gives you the answer with the explanation and it shows you how it got to the answer !
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3 years ago
1. Solve using long division.
Ann [662]

Answer:

9x^2 - 3x - 2,  R -7.

Step-by-step explanation:

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        9x^3 - 45x^2

                  - 3x^2 + 13x

                   -3x^2 + 15x

                                -2x + 3

                                -2x + 10

                                          -7 <----- Remainder

5 0
3 years ago
1. Ima Thief robs a bank and takes off in a getaway car. Five minutes Polly Srule takes off after Ima.
chubhunter [2.5K]

Answer:

a. 12 minutes

b. 34 minutes

Step-by-step explanation:

Here, we are told that Ima has driven 5 minutes before Polly started driving

So if Ima has driven for x minutes , polly would have driven for y minutes but the difference between x and y is 5

So mathematically;

x = y + 5

a. 17 = y + 5

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b. x = 29 + 5

x = 34 minutes

8 0
3 years ago
An item is regularly priced at $85. It is on sale for 40% off the regular price. How much in dollars) is discounted from the reg
skad [1K]

Answer:

34 dollars were discounted

Step-by-step explanation

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7 0
3 years ago
Read 2 more answers
According to the graph, what is the value of the constant in the equation
wolverine [178]

The question is missing the graph. So, it is attached below.

Answer:

(D) 3.2

Step-by-step explanation:

Given:

A graph of height versus width.

The equation given is:

Height = constant × Width

Rewriting in terms of 'constant'. This gives,

\textrm{Constant}=\frac{Height}{Width}------------- (1)  

The width is plotted on the X-axis and the corresponding height is plotted on the Y-axis.

The four points plotted on the line are:

(x, y) = (0.5, 1.6), (1, 3.2), (2, 6.4)\ and\ (3, 9.6).

Now, any point will satisfy equation (1).

Consider the point (0.5, 1.6). So, height = 1.6 and width = 0.5. Therefore,

\textrm{Constant}=\frac{Height}{Width}\\\\\textrm{Constant}=\frac{1.6}{0.5}=3.2

Also, we observe that for all the remaining points,

\dfrac{3.2}{1}=\dfrac{6.4}{2}=\dfrac{9.6}{3}=3.2.

Hence, the value of the constant is 3.2.

Option (D) is correct.

4 0
3 years ago
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