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Serhud [2]
2 years ago
12

Your grades on three exams are 80, 93, and 91. What grade do you need on the next exam to have an average of 90 on the four exam

s? sb help
Mathematics
1 answer:
Pani-rosa [81]2 years ago
8 0

<u>Answer:</u>

96

<u>Step-by-step explanation:</u>

Let's assume that the marks needed in the next exam is x. Then if the average becomes 90,

\frac{80 + 93 + 91 + x}{4}= 90

Now we can simply solve for x:

⇒ \frac{264 + x}{4}= 90

⇒ 264 + x = 360            [Multiplying both sides by 4]

⇒ x = 360 - 264            [Subtracting 264 from both sides]

⇒ x = \bf96

Therefore, you need to score 96 in your next exam to have an average of 90 on the four exams.

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Answer:

82.67 Kilograms

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2 years ago
An 8% sales tax is applied to a $300 purchase in Texas. What is the total price with tax
natta225 [31]

Answer:

324

Step-by-step explanation:

<u>Step 1:  Find the sales tax </u>

Equation → 300 * 0.08 = x

300 * 0.08 = x

24 = x

<u>Step 2:  Find the total </u>

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300 + 24

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Answer: 324

8 0
3 years ago
Read 2 more answers
−2(−3x+4)+3x−3=−29 what does x equal
gogolik [260]

Answer:

x = −2

Step-by-step explanation:

Let's solve your equation step-by-step.

−2(−3x+4)+3x−3=−29

Step 1: Simplify both sides of the equation.

−2(−3x+4)+3x−3=−29

(−2)(−3x)+(−2)(4)+3x+−3=−29(Distribute)

6x+−8+3x+−3=−29

(6x+3x)+(−8+−3)=−29(Combine Like Terms)

9x+−11=−29

9x−11=−29

Step 2: Add 11 to both sides.

9x−11+11=−29+11

9x=−18

Step 3: Divide both sides by 9.

9x /9  =  −18 /9

x=−2

I hope this helps!!!

3 0
3 years ago
Read 2 more answers
Simplify the following expression.<br> -16 - 8/2 + 25 ÷ 5 + 1<br> -18<br> 6<br> 10<br> -6
Andrews [41]
The answer is -6. Thought there is a chance I am wrong. Need an explanation?
6 0
3 years ago
Solve the equation using the distributive property and properties of equality. Negative 5 (a + 3) = negative 55 14 -8 8 -14
trasher [3.6K]

Answer:

11

Step-by-step explanation:

55 divide 5 = 11

11 + 3 = 15

5 × 11 = 55

3 0
3 years ago
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