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Grace [21]
3 years ago
14

Please answer this correctly

Mathematics
2 answers:
Anettt [7]3 years ago
8 0

Answer:

purple graph  24 in class

Step-by-step explanation:

Let x = people in the class

25% chose amber

6 chose amber

x*25% = 6

.25x = 6

Divide each side by .25

.25x/.25 =6/.25

x =24

miv72 [106K]3 years ago
5 0

Answer:

24

Step-by-step explanation:

Its the first model in purple. There are 6 students that represent a quarter of the class, so there is 6*4 = 24 students total.

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What is the sum of 19x8 ?
Juliette [100K]

Answer:

152

Step-by-step explanation:

1. 9 x 8 = 72

2. 1 x 8 = 8

3. 8 + 7 = 15

or

8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8

or

19 + 19 + 19 + 19 + 19 + 19 + 19 + 19

7 0
2 years ago
What is the product of -6x3 and 2x5?
slamgirl [31]

Answer:

for the first one it's going to be -30 and the second one is 10

6 0
2 years ago
Graph the equation y = -7/2x + 2
8_murik_8 [283]

Answer:

Use Desmos or:

Step-by-step explanation:

Or you can make a simple table.

So for you x axis have a range of -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, Then sub in the x values in the equation. For example:

y=-7/2x+2  for the x use -5

y=-7/(2)(-5) or 2 times -5 and then add two. It will give you a y value. Do this for the rest of the values and you will get x and y values and you can easily plot a graph.

8 0
3 years ago
Cecile drew a 4-sided figure. It had 2 sides that were 3.4 centimeters long and 2 sides that were 3.3 centimeters long. It had a
AlekseyPX
We have two pairs of equal sides; one pair of length 3.4 cm each and one pair od 3.3 cm each.

There quadrilateral (four-sided shape) that meet this first condition is:
Parallelogram 
Rhombus
Rectangle

The only shape that has at least 3 angles of 90° would be RECTANGLE as the other shapes don't have right angle




3 0
3 years ago
A carpentry shop currently sells 66000 decoy ducks per year at a cost of 16 dollars each. In the previous year when they raised
Rus_ich [418]

Answer:

19 dollars

Step-by-step explanation:

<h2>Buckle up! This is a good one!</h2>

First we have to find the line that goes trough the two points. And it has the form :

y=mx+b

<em>m is often called the slope.</em>

Given the two points (66000, 16) and (51000, 21) we find m with this formula:

m=\frac{y_{2} -y_{1} }{x_{2} -x_{1} }\\m=\frac{21-16}{51000-66000} \\m=-\frac{5}{15000} \\m=-\frac{1}{3000}

We pick the point (51000,21) and plug it into the equation of the line and we find b:

y= mx + b\\21=(-\frac{1}{3000} )(51000)+b\\21=-17+b\\21+17=b=38

<h3>And we have got our line equation</h3>

y= -\frac{1}{3000}x + 38\\

<u>Where x represents the quantity and y represents the price.</u>

<u />

<h2>The revenue</h2>

The revenue is price times quantity, since price is y and quantity is x, we get

y=-\frac{1}{3000} x+38\\y*x=x*(-\frac{1}{3000} x+38)\\yx=-\frac{1}{3000} x^2+38x\\R(x)=-\frac{1}{3000} x^2+38x

<h3>to maximize the revenue, we get the first derivative:</h3>

R(x)=-\frac{1}{3000} x^2+38x\\R'(x)=-(2)\frac{1}{3000} x+38\\R'(x)=-\frac{2}{3000} x+38\\\\R'(x)=-\frac{1}{1500} x+38\\\\

<h3>and we make R'(x)=0:</h3>

R'(x)=-\frac{1}{1500} x+38=0\\38=\frac{1}{1500} x\\38*1500=x=57000

So the quantity that maximizes revenue is 57000,

<h3>let's find out the price by plugging it into the equation:</h3>

y= -\frac{1}{3000}x + 38\\y= -\frac{1}{3000}(57000) + 38\\y= -19 + 38\\y=19

<h2>And there you go! 19 dollars is the price the carpentry shop should charge per decoy duck.</h2>
7 0
3 years ago
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