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2 years ago

Plz help i dont have much time

Mathematics

2 answers:

yawa3891 [41]2 years ago

5 0

1: 5

2: -28

3: 10.4

4: 0.875

5: 0

6. 8,003

5 techincally should be nonzero but I assume 0 is what the teacher is looking for.

Kryger [21]2 years ago

3 0

Answer:

I believe it's asking for the additive inverse so,

1. 5

2. -28

3. 10.4

4. -0.875

5. 0

6. 8,003

Step-by-step explanation:

hope this is what u need

if it's right pls mark brainleist

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Answer:

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3 years ago

Alex scored 98,72, and 87 on his first three math test. What must he score on the next test to have an average of at least 86 (P

ss7ja [257]

Answer:

$\huge\boxed{\text{At least an } 87\%}$

Step-by-step explanation:

In order to find what score Alex must earn to have an average of 86 on all his tests, we need to first note what the formula to find the average of a data set is.

$\displaystyle \frac{x_1+x_2+...x_n}{n}$

What the formula means is that we have to add up all the values then divide by the total number of values.

Let's represent our unknown number as $x$ .

$\displaystyle \frac{98+72+87+x}{4} \geq 86$ (since we want AT LEAST an 86).

Let's solve this inequality for x.

$\frac{98+72+87+x}{4} \cdot 4 \geq 86 \cdot 4$
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$257 + x - 257 \geq 344 - 257$
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So, Alex must score at least an 87% on his next quiz to have an average of 86%.

Hope this helped!

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