Stamps = 100, Postcards = 40
100 x 0.41 cents + 40 x 0.26 cents = $41 + $10.4 = $51.4
------ Solution-----
$0.41 x STAMPS + $0.26 x POSTCARDS = $51.4
1 STAMP = 20 + 2 x POSTCARDS
$0.41 x (20 + 2 x POSTCARDS) + $0.26 POSTCARDS = $51.4
POSTCARDS = 40
STAMPS = 20 + 2 x 40 = 100
Answer:
Julie bought 40 postcards and 100 stamps.
Step-by-step explanation:
Write the equation by adding the total values of each item.
0.41 (2p+20)+0.26p = 51.40
We can solve this equation for p to find the number of postcards.
0.41(2p+20)+0.26p =51.40
0.82p+8.20+0.26p=51.40
1.08p=43.2
p=40
So, the number of postcards she bought is 40. Since the number of 41-cent stamps is 20 more than twice the number of postcards, the number of 41-cent stamps is 2(40)+20=100.
160 * .2 = 32
160 - 32 = 128
−10x2 − 39x + 4
−15x2 − 21x + 18
Answer:
-28-60x
Step-by-step explanation:
-20-39x+4-30-21x+18
-20-30+18+4-39x-21x
-50+22-60x
A. 15.9ft
B. 24.84ft
C. 31.8ft
D. 11.73ft
Answer:
C. 31.8ft
Step-by-step explanation:
Perimeter of a parallelogram is calculated by this formula P = 2(a+b) (b: base, a: side)
The base given here is 10.8 ft and side is 5.1 ft
2 × (5.1+10.8) = 31.8 ft
Answer:
B) 24.84.
Step-by-step explanation:
Its hard to explain but ===>
First do Pythagorean theorem with 2.3 and 5.1.
You will need to do two thing with that answer.
First subtract it from the 10.8. That will be used for later.
Also, multiply it by 2.3 that is for the triangles that are on the sides.
Next you will want to take the number you set aside and multiply it by 2.3.
Finally add and you will have your answer.
Answer: 54
Step-by-step explanation:
3x3=9
9x3=27
27x2=54