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blondinia [14]
3 years ago
6

a student must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of B

. Devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a B in the course? ( assuming the highest grade is 100%)
Mathematics
1 answer:
Bad White [126]3 years ago
6 0

Answer:

  89–100

Step-by-step explanation:

Let x represent the grade on the fifth test. The average for 5 tests wants to be between 80 and 90, so we have ...

  80 ≤ (78 +62 +91 +80 +x)/5 ≤ 90

Multiplying by 5 gives

  400 ≤ 311 +x ≤ 450

Subtracting 311 gives the range for the fifth test grade.

  89 ≤ x ≤ 139

Since the maximum available score is 100, the range on the 5th test for an overall B grade is ...

  89 ≤ x ≤ 100 . . . . where x is the grade on the 5th test

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234 students in 9 different classrooms. What is the ratio of students to classrooms?
Vilka [71]

Answer:

26 students per classroom

Step-by-step explanation:

To solve this, the ratio 234 students:9 classrooms must be converted to:

s students:1 classroom

To convert the ratio, 9 was divided by 9 to get 1, and so you must also divide 234 by 9 to maintain the same ratio, which gives us the answer:

26 students: 1 classroom

5 0
3 years ago
Liam explains that drawing a yellow card is equivalent to drawing a blue card followed by a red card how many spaces forward or
Ivenika [448]

Complete question :

designs a board game in which a card is drawn on each turn. • A blue card means move forward 4 squares. • A red card means move back 6 squares. Liam suggests adding some other cards to Sia's game Part A Liam explains that drawing a yellow card is equivalent to drawing a blue card followed by a red card. How many spaces forward or backward does a player move after drawing a yellow card? Justify your answer.

Answer:

2 squares backward

Step-by-step explanation:

Given the rule :

Blue card = 4 squares forward

Red card = 6 squares backward

Yellow card = drawing a blue followed by a red

Spaces moved after drawing a yellow card:

Yellow equals :

Blue = + 4 squares ; then

Red = - 6 squares

Net total movement :

Blue + red

+4 + (-6)

4 - 6

- 2

2 squares backward

7 0
3 years ago
Picture of problem below NO LINKS
iragen [17]

Answer:

600$

Step-by-step explanation:

I think this is right

5 0
3 years ago
Jacques needs to convert the function f(x) = x2 − 6x + 14 to vertex form, f(x) = (x − h)2 + k, in order to find the minimum.
Anarel [89]

k = 5

the equation of a parabola in vertex form is

y = a(x - h)² + k

where (h, k ) are the coordinates of the vertex and a is a multiplier

To obtain this form use the method of completing the square

Since the coefficient of the x² term is 1 then

add/ subtract (half the coefficient of the x-term )² to x² - 6x

f(x) = x² + 2(- 3)x + 9 - 9 + 14 = (x - 3)² + 5 → k = 5


   

5 0
3 years ago
Read 2 more answers
6) Mrs. Larson from Bay County Schools is in charge of buying supplies. She purchased 95
svp [43]

Answer:

$3708.80

Step-by-step explanation:

Since she bought 95 pencil sharpeners for $39.04, multiply 95 and 39.04.

95 × 39.04 = 3708.8

4 0
4 years ago
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