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3 years ago

What grade do you have to get on the final to maintain an average of at least a 90 if you have grades of 85 and 86

1 answer:

4 0

If your final is worth 15% of your grade and you have an 85 you need to score 118.33%. If you have an 85 and the final is worth 20% you need a 110%. If you have an 86 and the final is worth 15% you need 112.67%. If you have an 86% and the final is worth 20% you need a 106%. Good luck

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-2x+4y= 12 3x+7y= 18 last one greatly appreciated

LenaWriter [7]

Value of x is $\frac{-6}{13}\\$ and y is $\frac{36}{13}$

Solution set is ( $\frac{-6}{13}\\$ , $\frac{36}{13}$ )

Step-by-step explanation:

We need to solve the system of equations given.

$-2x+4y=12\\3x+7y= 18$

Solving

Let:

$-2x+4y=12\,\,eq(1)\\3x+7y=18\,\,eq(2)$

Multiply eq(1) by 3 and eq(2) by 2 and add both

$-6x+12y=36\\6x+14y=36\\-------\\26y=72\\y=\frac{72}{26}\\y=\frac{36}{13}$

Putting value of y in equation 1

$-2x+4y=12\\-2x+4(\frac{36}{13})=12\\-2x+\frac{144}{13}=12\\-2x=12-\frac{144}{13}\\-2x=\frac{12*13-144}{13}\\-2x=\frac{12}{13}\\x=\frac{-6}{13}\\$

So, value of x is $\frac{-6}{13}\\$ and y is $\frac{36}{13}$

Solution set is ( $\frac{-6}{13}\\$ , $\frac{36}{13}$ )

Keywords: System of equations

Learn more about system of equations at:

#learnwithBrainly

7 0

4 years ago

Explain how you would determine if these amounts are the same or

Inga [223]

Answer: they are he same as 75%

Step-by-step explanation:

onvert 3/4 to a percent. Begin by converting the fraction 3/4 into decimal. Multiply the decimal by 100 and write the result with the percentage sign: 0.75 × 100 = 75%.

6 out of 8 can be written as 6/8 and equals to 75%. Let's understand the conversion of a fraction to a percentage. To find the percent for this fraction, we have to find the number of parts that would be shaded out of 100. To convert a fraction to percent, we multiply it by 100/100.

3 0

3 years ago

A small grain silo is filled with wheat at the end of each season. If the silo is only half full, how many cubic meters of wheat

Nonamiya [84]

Answer:

Volume of wheat = 147.26 m³ (check the explanation)

Step-by-step explanation:

The question still lacks some details such as the size of the silo. We will go forward by assuming the size of the silo to aid our calculation. Silos are cylindrical storage structures that range from 3 - 27 m in diameter and 10 - 90 m in height. For the purpose of this question, let's assume that the size of the silo is 5 m (diameter) by 15 m (height).

Let's list out the parameters to be used:

diameter (D) = 5 m; r = D ÷ 2 ⇒ r = 5/2 = 2.5 m,

height (h) = 15 m

Volume of silo = πr²h = π * 2.5² * 15

V (silo) = 294.52 m³

The silo is half full ⇒ ½ * V

Volume of wheat stored is given by half of the silo volume, since the silo is half-full

V (wheat) = ½ * 298.52

V (wheat) = 147.26 m³

6 0

3 years ago

What is the equation of the line of best fit for the following data? Round the slope and y-intercept of the line to three decima

Nadusha1986 [10]

Answer:

Step-by-step explanation:

it is really simple if you think about it or maybe I'm wrong

8 0

3 years ago

Read 2 more answers

PLEASE HELP ME AND WRITE IN SIMPLIFIED FRACTIONS PLEAAAASSSSSEEE

saw5 [17]

Event A: The sum is greater than 5.There are 10 sums equal to 5 or less. Therefore there are 26 sums greater than 5.P = 26/36
Event B: The sum is divisible by 4.The sums that are divisible by 4 are the three 4's, five 8's, and the one 12.That means there are nine sums divisible by 4. P = 9/36

8 0

3 years ago