Answer:
1695.6 in3 ;)
Step-by-step explanation:
R= -4
a= -3
using ∑n = a(1-rⁿ)/1-r
∑n:10 = -3(1-(-4)^10)/ 1-(-4)
= -3(1-1,048,576)/1+4
= -3(-1048575)/5
= 3,145,725/ 5
= 629,145
Answer:
5 feet high
Step-by-step explanation:
A= LxW
Yx4= 20
/4 /4
Y= 5ft
It is 5ft high
Multiply both sides by 8. Then divide both sides by 3. Answer is 8/3
Answer:
a= 18 girls in the class, b= 20 boys and 15 girls, 12 oranges better price.
Step-by-step explanation:
for question a, there are 18 girls in the class, this is how i worked it out:
the ratio of boys to girls is 4:3.
there are 24 boys.
24 is 6 times more than 4.
if boys are 6 times more than the original ratio, we also have to times the amount of girls by 6.
6x3= 18.
for question b i got 20 boys and 15 girls, this is how i did it.
there are 35 students in total.
4:3= boys to girls.
4+3=7
7 goes into 35 five times.
ratio of boys to girls is 4:3 so 5x4 for boys = 20 and 3x5 for girls = 15.
answer= 20 boys and 15 girls.
12 oranges is a better deal, this is how i worked it out.
it is 60 for 12 oranges.
it is 48 for 8 oranges.
12x5= 60 , 8x6=48.
you only have to times 12 by 5 to get it to the price but you have to times 8 by 6 to get it to the price, proving that 12 oranges for 60 is a better deal.
