Answer:
Her average score was 84, add them all up and divide by 5
Step-by-step explanation:
10 Celsius
Explanation: SIRI said
The question is incomplete hence, I gave you a similar question that will enable you to understand how to treat Linear Equations with Decimals.
<h3>What is a Decimal system within Linear equations?</h3>
This is best exemplified by the example below:

e
Solution
Step 1 - Remove all decimals by multiplying equation 1 and 2 by 10. This gives us:

Now we have an equation without decimals.
Step 2 - we proceed to solve by elimination.
Assuming:
2x - 3y = 13 ............is Equation 3; and
5x -2y = 23 ............. is Equation 4;
Lets multiply equation 3 by 2; and equation 4 by 3. This gives us
⇒ 4x - 6y = 26 ...............5
15 x + 6y = 69..............6
step 3 - Add equation 5 and 6 to eliminate y.
4x - 6y = 26
<u> 15 x + 6y = 69
</u>19x = 95
solving for x
= 95/19
x = 5
Step 4 - Substitute x into any of the equations to find the value of Y
Using equation 5, we have:
4x - 6y = 26
⇒ 4(5) - 6y = 26
⇒ 20 - 6y = 26
⇒ -6y = 26-20
⇒ y = 6/-6
∴ y = -1
In summary, x = 5; y = -1
Learn more about Linear systems with decimals at:
brainly.com/question/10566339
#SPJ1
Answer:
20:8
Step-by-step explanation:
28/(5+2)=4
4*5=20
4*2=8
Answer:
Answer choice A(57%)
Step-by-step explanation:
The margin of error is 7%. This means the 63% could either 7% too high or 7% too low. Answer choice A is the only answer choice that is within the range of percents that it could possibly be(between 56% and 70%). Answer choice B is 10% off, 3% out of the range. Answer choice C is 25% off, 18% out of the range. Answer choice D is 32% off, 24% out of the range. Hope this helps. :)