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Vilka [71]
3 years ago
12

Melinda will take15 quizzes this semester. She would like to score a B or better on at least 90% of them. So far, she has gotten

a B or better on 6 quizzes. Which inequality can be used to determine how many more quizzes she must score a B or better on? StartFraction 6 + x over 15 EndFraction less-than-or-equal-to StartFraction 9 over 10 EndFraction StartFraction 6 + x over 15 EndFraction greater-than-or-equal-to StartFraction 9 over 10 EndFraction StartFraction 6 over 15 EndFraction + x greater-than-or-equal-to StartFraction 9 over 10 EndFraction StartFraction x minus 6 over 15 EndFraction greater-than-or-equal-to StartFraction 9 over 10 EndFraction
Mathematics
2 answers:
Sphinxa [80]3 years ago
7 0

Answer: B

Step-by-step explanation:

I took the test

Vaselesa [24]3 years ago
5 0

Answer:

The correct answer is B

Step-by-step explanation:

The i got 100% on the quiz

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If quadrilateral PQRS is a rectangle, then which of the following is true? ∠PSQ ≅ ∠QSR segment SR ≅ segment RQ segment PS ≅ segm
natima [27]

Answer:

Because the diagonals of a rectangle are congruent, the statement "segment SQ ≅ segment PR" is true.

5 0
3 years ago
Find AB using the segment addition postulate.
Elena-2011 [213]
Answer : AB = 12

Explanation:

2x + 6 + 5x - 3 = 24
7x + 3 = 24
x = 3

AB = 2x + 6 = 2(3) + 6 = 12
7 0
3 years ago
The average of 9 scores is x. If the tenth score is 36 points more than x, by how many points will the tenth score raise the ave
Alecsey [184]

Answer:

3.6

Step-by-step explanation:

The average of 9 scores is x.

average = (sum of scores)/(number of scores)

x = (sum of scores)/9

sum of scores = 9x

The sum of the 9 scores is 9x.

The tenth score is 36 more than x, so it is x + 36.

The sum of the 10 scores is 9x + x + 36 = 10x + 36.

The average of the 10 scores is (10x + 36)/10 = x + 3.6

The difference of averages is

x + 3.6 - x = 3.6

5 0
3 years ago
A 100 inch strip of sheet metal starting out 16 inches wide is to be made into a small open trough (open top and ends) by turnin
daser333 [38]

Answer:

4 inches should be turned up on both sides.

Step-by-step explanation:

In order to find this, create a situation in which we give the amount turned up on each side as x. Then give the amount that isn't turned up as 16 - 2x (since 2x is the amount turned up). Now we can find the area by multiplying the 3 measurements.

100 * x * (16 - 2x) = MAX

100 * (16x - 2x^2) = MAX

-200x^2 + 1600x = MAX

Now that we have a quadratic function, we can find the maximum value of x by using the vertex formula for x values (-b/2a).

x = -b/2a

x = -1600/2(-200)

x = -1600/-400

x = 4

8 0
3 years ago
Is the ordered pair (2,1) the solution the the equation y=1-x
AleksAgata [21]
(x,y)
(2,1)
sub 2 for x and 1 for y and see if you get a true statemtn

2=x
y=1
1=1-2
1=-1
false
no it is not a soluiton
4 0
3 years ago
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