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Alex_Xolod [135]
3 years ago
14

Olivia randomly samples 50 students attending a basketball game and asks what grade they are in. Of the studets surveyed, 19 wer

e in the seventh grade. I
there are 200 students attending the basketball game, based on the sample, how many of them are in seventh grade?
Mathematics
1 answer:
Ulleksa [173]3 years ago
3 0

Answer:

76

Step-by-step explanation:

19 out of 50 are in 7th grade.

200/50 = 4

Multiply both numbers in the ratio by 4.

19 out of 50 = 76 out of 200

Answer: 76

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Classify the system of equations 2x + y - 7 = 0 1/3 x + y - 4 = 0
KATRIN_1 [288]

Answer:

B

Step-by-step explanation:

The equations are:

2x + y - 7 = 0

and

1/3x + y -4 = 0

Let's rearrange the first to get:

y = -2x + 7

Putting this into the 2nd equation we get:

\frac{1}{3}x + y -4 = 0\\\frac{1}{3}x + (-2x+7) -4 = 0\\\frac{1}{3}x-2x+7-4=0\\\frac{5}{3}x=3\\x=\frac{9}{5}

Now, y would be:

y=-2x+7\\y=-2(\frac{9}{5})+7\\y=3\frac{2}{5}

Solving the equation we see that there is 1 unique solution with 1 x value and another y values. That means, when graphing, the lines would intersect.

Answer choice B is right.

<u>Note:</u> Coincident means the same line and parallel means there would be no solution when solving

3 0
3 years ago
A rancher has 400 feet of fencing to put around a rectangular field and then subdivide the field into 3 identical smaller rectan
MAXImum [283]

Answer:

longer parallel sides are 150ft each with 4 shorter sides at 25ft each making a rectangle and 3 identical sections.

Step-by-step explanation:

150 + 150 = 300

4 ×25 = 100

300+100=400

5 0
3 years ago
The ratio of the heights of two similar prymaids is 3:2
Charra [1.4K]
What is the question?

4 0
3 years ago
(Geometry HELP) The perimeter of WXY is ___ cm?
jeka57 [31]
I hope this helps you



QR=WS=2.93



RS=QW =2.04


QS=XR =2.28


RS=XQ=2.04



SY=QR =2.93


RY=QS =2.28


XY=XR+RY=2.28+2.28=4.56


XW=XQ+QW=2.04+2.04=4.08


WY=WS+SY=2.93+2.93=5.86


Perimeter of XYW=XW+WY+XY


Perimeter of XYW=4.08+5.86+4.56


Perimeter of XYW =14.5


8 0
4 years ago
pLZZ i really need help my assignment past due and i just have one more question, please thankyou!!!!!!!!
bekas [8.4K]

Answer:

the answer is c

Step-by-step explanation:

convert the fractions to improper fractions 4/3 and 7/4 then multiply these fractions. youll get 28/ 12 and simplify to 2 1/3

6 0
3 years ago
Read 2 more answers
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