She must have a score greater than 69 in her final tests
Let the required score be "x"
<h3>What is Mean?</h3>
The mean of the data is the ratio of the sum to the total sample
Mean = 80+76+85+85+x/5
80+76+85+85+2x/5 > 79
326+x/5 > 79
326 + x > 395
x > 395 - 326
x > 69
This shows that she must have a score greater than 69 in her final tests
Learn more on mean here: brainly.com/question/1136789
Answer:
D
Step-by-step explanation:
1+3(6-3n)= -6-4n
1+18-9n= -6-4n
1+18+6= 9n-4n
25=5n
25/5=n
5=n
Answer:
Temperature.
Step-by-step explanation:
Temperature is a measure of the average kinetic energy of all the molecules in a gas. As the temperature, and therefore kinetic energy, of a gas changes the RMS speed of the gas molecules also changes. The RMS speed of the molecules is defined as the square root of the average of each individual velocity squared.
1) 12, 14
This is the answer because each increasing number was increased by 2, so if you add 2 to 10, you'd get 12. If you add 2 to 12, you would get 14.
2) 50, 54
Same explanation as above but for the number 4.
3) 68, 50
Same explanation as 1, but with subtracting the number 6.
4) 67, 69
Same as number 1
5) 103, 101
Same as number 3 but subtracting the number 2
Hope this helps!!! :)
Answer:
c. 28 liters
Step-by-step explanation:
Given tha tJanet is mixing a 15% glucose solution with a 35% glucose solution. This mixture produces 35 liters of a 19% glucose solution. Now we need to find about how many liters of the 15% solution is Januet using in the mixture.
Let the number of liters of the 15% solution is Januet using in the mixture = x
Let the number of liters of the 35% solution is Januet using in the mixture = y
Then we get equations:
x+y=35...(i)
and
(15% of x) + (35% of y) = 19% of 35.
or
0.15x+0.35y=0.19(35)
15x+35y=19(35)
3x+7y=19(7)
3x+7y=133 ...(ii)
solve (i) for x
x+y=35
x=35-y...(iii)
Plug (iii) into (ii)
3x+7y=133
3(35-y)+7y=133
105-3y+7y=133
105+4y=133
4y=133-105
4y=28
y=28/4
y=7
plug y=7 into (iii)
x=35-y=35-7=28
Hence final answer is c. 28 liters