Answer:
a=1 b = -7 and c = 10
Step-by-step explanation:
z^2-7z+10=0
The quadratic is written in the form
ax^2 +bx+c=0
Letting x become z
az^2 + bz+c =0
a=1 b = -7 and c = 10
Answer:
It's basically just simplifying . Also for a little extra cheat just look up MathPapa or whatever the subject in math is and end it with calculator, usually these really help solve problems!
Good Luck, Hope those come in handy :))
The age of Jennifer is 16.
<h3>What is Jennifer's age?</h3>
Let Jennifer's age be represented with x
Jonathan's age would be 2x
The sum of their ages would be 48
2x + x = 48
3x = 48
x = 48 /3 = 16
To learn more about addition, please check: brainly.com/question/19628082
#SPJ1
Bill $10
Tip at 25% is $2.50
Total before tax is $12.50
First, you need to find the mean of all this set of numbers. You would add them all together and then divide by 6 which is 50.5.
Now you find the sample variance. Subtract each number from the mean.
<span>15.5, 13.5, 8.5, -6.5, -10.5, -19.5 </span>
After, you square each value and add them.
<span>240.25+182.25+72.25+42.25+110.25+380.2... </span>
<span>= 1027.5 </span>
Now divide by 5 (because it's a sample variance) and you get 205.5.
