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Nastasia [14]
2 years ago
14

In speech class, Carolyn needs at least a B + to keep her financial aid. To earn a B+, the average of her four speeches must be

at least an 85. On the first 3 she scored 85, 77, and 81. Determine the minimum score speech to get a B+.​
Mathematics
2 answers:
soldier1979 [14.2K]2 years ago
6 0

Answer:

  97

Step-by-step explanation:

Relative to the average she wants, Carolyn's scores are ...

  85-85 = 0

  77-85 = -8

  81-85 = -4

Carolyn's score total is -8-4 = -12 points from the average she wants, so she must get 85+12 = 97 on her speech to achieve a B+ average.

_____

<em>Check</em>

With a 97, Carolyn's average would be ...

  (85 +77 +81 +97)/4 = 340/4 = 85

Arada [10]2 years ago
4 0

Answer:

<h3>The minimum score speech to get a B+ is 89.</h3>

Step-by-step explanation:

Average of the first 3 = 85 + 77 + 81 / 3

= 243 / 3

= 81

The fourth score ( to get 85 ) = 81 + 89

= 170 / 2

= 85

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solong [7]

The scientist that made a more concentrated salt solution is scientist A.

<h3>How to compute the value?</h3>

Since Scientist A dissolved 1.0 kilogram of salt in 3.0 liters of water. The concentration will be:

= 1/3 = 0.33

Scientist B dissolved 2.0 pounds of salt into 7.0 pints of water. The concentration will be:

= 2/7

= 0.285

Therefore, the scientist that made a more concentrated salt solution is scientist A.

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4 0
1 year ago
PLEASE HELP ASAP!!! I NEED CORRECT ANSWERS ONLY PLEASE!!!
Debora [2.8K]

Yo sup??

you can solve this quesion by having the knowledge of trigonometric ratios

let angle B be x, then

tanx=7/3

x=66.8

Hope this helps

4 0
3 years ago
Help and explain plzzzzzz
lubasha [3.4K]
14/175 x 100 = 8%

answer is A. 8 (first choice)
8 0
3 years ago
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What is the measure of ABD?
Lostsunrise [7]

Answer:

try d or c

Step-by-step explanation:

3 0
3 years ago
2.) Bob has two weekend jobs. Last weekend he made a total of $77 after
Butoxors [25]

Answer:

Step-by-step explanation:

x= money earned per hour working as a cashier.

y=money earned per hour working delivering newspapers.

We propose the following system of equations:

5x + 4y =77

6x + 3y=78

We solve the system by reduction method:

-6*(5x+4y=77) ⇒  -30x-24y=-462

5*(6x+3y=78)⇒     30x+15y=390

                             ---------------------------

                                     -9y=-72  ⇒   y=-72 /-9=8

Now, we get the value of "x" replacing the value of "y" by "8" in any part of the equation above.

5x + 4(8)=77

5x+32=77

5x=77-32

5x=45

x=45/5=9

therefore;  

money earned per hour working as a cashier= $9/ hour

money earned per hour working delivering newspapers=$8/hour

7 0
3 years ago
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