Astore sells 2 1/4 pounds of mulch for every 1 1/2 pounds of gravel sold. the store sells 180 pounds of mulch and gravel combined. how many pounds of each item does the store sell?

The pounds of mulch the store sells are 108 and the pounds of gravel the store sells are 72.

Step-by-step explanation:

Let

x -----> pounds of mulch the store sells

y ----> pounds of gravel the store sells

we know that

-----> equation A

Remember that

so

-----> equation B

solve the system by substitution

substitute equation B in equation A

solve for y

Find the value of x

The solution is the ordered pair (108,72)

therefore

The pounds of mulch the store sells are 108 and the pounds of gravel the store sells are 72.

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

happy to

pls mark as brainliest

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have