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Elena-2011 [213]
4 years ago
12

Write a proportion to find how many points x a student needs to score on a test worth 50 points to get a test score of 78%. $$

Mathematics
2 answers:
Vera_Pavlovna [14]4 years ago
7 0
78% of 50 points = 0.78 x 50 
78% of 50 points = 39

--------------------------------------------------------------------
Answer: The student needs to score 35 points.
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Brums [2.3K]4 years ago
6 0

Answer: The student needs to score 35 points.

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Val rented a bicycle while she was on vacation. She paid a flat rental fee of $55.00, plus $8.50
Oksana_A [137]
55 + 8.50d = 123

55 for rental
8.50d for each day she pays 8.50 so add the d and then equal sign and 123.
3 0
3 years ago
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Use the quadratic formula to solve the equation <br><br> x^2-3x+2=0
Flura [38]

Answer:

x= 1, 2

Step-by-step explanation:

The quadratic formula is x=\frac{-b+/-\sqrt{b^2-4ac} }{2a}. Here a=1, b=-3, and c=2.

Substitute and you'll have:

x=\frac{-b+/-\sqrt{b^2-4ac} }{2a} =\frac{3+/-\sqrt{(-3)^2-4(1)(2)} }{2(1)}=\frac{3+/-\sqrt{9-8} }{2)}

\frac{3+/-\sqrt{1} }{2}=\frac{3+/-\sqrt{1} }{2}=\frac{3+/-1 }{2}= 2 , 1

3 0
4 years ago
The ratio for mixing mortar using sand, lime and cement is 3:2:1.
yulyashka [42]

Answer:

Sand: 21 parts.

Lime : 14 parts.

Cement: 7 parts.

Step-by-step explanation:

The number of parts is 3 + 2 + 1 = 6.

So for 42 parts we need:

Sand: 3/6 * 42 = 1/2 * 42 = 21.

Lime:  2/6 * 42 = 1/3 * 42 = 14,

Cement: 1/6 * 42 = 7.

3 0
3 years ago
Nicole is planting a rectangular garden in her backyard. She wants the length of the garden to be 5 yards. The area of the garde
Morgarella [4.7K]

The inequality that best describes the width of the garden is

Width ≤ 6 yards

Area ≤ Length* Width

<h3>Given data</h3>

Length = 5 yards

Width = ??

Area = 30 square yards

From the formula of the area of rectangle we have

Area = Length * Width

Let the width be x

Substitute

30 = 5 * x

30 = 5x

Divide both sides by 5

x = 30/5

x = 6 yards

Hence the with should be less than or equal to 6 yards

Learn more about area of rectangle here:

brainly.com/question/2607596

8 0
3 years ago
The graph shows the charges for a health club in a month. Make a function table for the input-output values. Writes an equation
Dennis_Churaev [7]

Answer:

y =5x+30

Step-by-step explanation:

Given is a table showing the charges for a health club in a month.

The function table for the input output values are shown in the table with y for output and x for input

On analysing the table we find that for 1 increase in input there is 5 increase in output.

This implies that slope of the function is constant hence x and y are connected by a linear relationship, i.e. a straight line.

Since slope is 5 we get y = 5x+C

To find C substitute any value from the table say x=1

35=5(1)+C\\C=30

Hence equation is

y =5x+30

6 0
4 years ago
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