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soldier1979 [14.2K]
3 years ago
8

The teacher kept track of how long it took students to finish a test. After 20 minutes, 3 students had finished the test.

Mathematics
2 answers:
Olin [163]3 years ago
8 0
9 students finished the test 

hammer [34]3 years ago
7 0
Answer: D. 10 students finished the test.
How I got that:
20 x 4. Which got me 80. (You had to get after 70)
9.5 students finished but round that up to 10.
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(8,y) and (-2,4);slope =-1/5
Ivan

Answer:

y = 2

Step-by-step explanation:

Calculate the slope m and equate to - \frac{1}{5}

m = \frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }

with (x₁, y₁ ) = (- 2, 4) and (x₂, y₂ ) = (8, y)

m = \frac{y-4}{8+2} , that is

m = \frac{y-4}{10} = - \frac{1}{5}

Multiply both sides by 10 to clear the fractions

y - 4 = - 2 ( add 4 to both sides )

y = 2

6 0
3 years ago
Use the GCF of the terms to write the expression as the product of two factors with integer coefficients.
Alchen [17]
The greatest common factor (GCF) is determined by finding the greatest factor that would simplify all the terms of the equation the most. 

For the equation -2x³ - 4x² + 4x
The common factor for the coefficients -2, -4 and 4 is -2, since all of them are divisible by -2.
The common factor for the variables x³, x² and x is x, since all of them are divisible by x.

Then, the GCF would be -2x. We use this to simplify the equation:

-2x(x² + 2x -2)
7 0
3 years ago
Unsure on if I have the right answer worked out someone please say what you've got and how you've done it please
PilotLPTM [1.2K]
The answer is at 7:12 a.m, did you get that?


3 0
3 years ago
The endpoints of the longest chord on a circle are (4, 5.5) and (4, 10.5).the center of the circle is at the point , and its rad
Furkat [3]
 The midpoint of the points ( 4, 5.5 ) and ( 4, 10.5 ) is the center of the circle:
 C =(\frac{4+4}{2}, \frac{5.5+10.5}{2})
 C = ( 4, 8 ),  h=4, k=8
 r =\sqrt{(4-4)^{2} +(8-5.5)^{2} } = \sqrt{0+2.5^{2} }
 r = 2.5
 The equation of the circle in standard form:
 ( x - h )² + ( y - k )² = r²
 ( x - 4 )² + ( y - 8 ) = 6.25    
4 0
3 years ago
Read 2 more answers
Abigail mixes 2/3 pounds of walnuts with 3/5 pound of dried fruit. To create more of the same mixture, how many pounds of walnut
nignag [31]
1 1/9

To figure out how much walnuts to a pound of dried fruit you’d need to do proportions. So we cross multiply:

2/3 = X
—————- —————-
3/5 = 1

You multiply diagnols 2/3 x 1 = 2/3
3/5 times x is 3/5x.

2/3 = 3/5x. Isolate the variable. Divide 3/5 on both sides cancel out 3/5. 2/3 divide by 3/5 is 2/3 x 5/3 which is 10/9 which equals 1 1/9.

So for 1 lb of dried fruit you need 1 1/9 lb of walnuts to maintain the same mixture
7 0
2 years ago
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