Answer: ruler cost $12
Step-by-step explanation:
step 1
Let cost of ruler be represented as r
and cost of pencil be represented as p
we were given that
4 rulers and a pencil and these cost the same as 2 rulers and 4 pencils which is expressed as
4r + p = 2r+ 4p
and cost of pencil= $8
therefore
sTEP 2--- Solving
4r+ 8 = 2r+ 4 x8
4r+ 8 = 2r+ 32
4r - 2r= 32-8
2r= 24
r= 24/2 = r= $12
Jenna has a bag that contains 7 red marbles and 25 blue marbles.
She selects a marble at random, and then, without replacing the first one, selects <span>another marble at random.
</span>Let's find out the probability that Jenna selects a blue marble and then a red marble?
=> blue marble probability = 1/32
=> red marble = 1/31
Round to the nearest percentage = 3%
(-5, 12) because if it is going up four it is adding four to the y axis
The ratio of all marbles to the blue marbles is 1:3. There is a 33.3% chance that the next marble will be blue.
Answer:
w = 70
Step-by-step explanation:
w/10 = 7
w = 70