X+2x+3x+4x=9x. x is a variable that represents the number of points he won so far
Lets take a look at the options first.
option 1 and option 4 are not possible as (8x) (8x) would give us 64x^2, which is not what we want.
we’re left with option 2 & 3. when expanded, option 2 will look like :
16x^2 - 40x - 10x + 25
= 16x^2 - 50x + 25
however, we do not want the 50x. so the answer is option 3, (4x-5) (4x+5)
if you don’t want to find the answer using expanding, there is also another method of expanding.
(a+b)^2 = a^2 - b^2
in this case, 16x^2 will be a^2 and 25 will be b^2. not sure whether you’ve learn this but yea.
Answer:
300
Step-by-step explanation:
210(100) divided by 70 = 300
Answer:
4.50 + 1.25 = 5.75 x.15 = 0.8625
Round that to .86
$5.75 +.86(tip)
.86 cents
Step-by-step explanation:
Answer:
1. 3:4 3/4 75% 0.75 three fourths
2. 0.25 1/4 25% 1:4 one fourth
3. 6 tenths = three fifths 3/5 60% 0.60 3:5
4. 1/3 one third 1:3 0.33 33%
5. 80% 4/5 4:5 four fifths 0.8
6. 19/20 95% 0.95 nineteen twentieths. 19:20
7. 1 and 5 tenths 1.5 1 1/2 150% 3/2
8. 7:8 7/8 0.875 87.5% seven eighths
I believe this is everything you asked but if I didn't give something just tell me and I'm 99.9% sure all of these are correct. Hope this helps!