Solve each system by substitution

1. 2x + 3y =22
y=4

a. (-3,5)
b. (3,5)
c. (5,4)
d. (4,5)

2. y=0
-5x - 2y = -15

a. (-2,6)
b. (3,0)
c. infinite number of solutions
d. (3,-2)

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extra

there are 14 animals in the field. some are goats and some are ducks. there are 42 legs in all. how many of each animal are in the field?

a. 11 ducks and 4 goats
b. 12 ducks and two goats
c. 11 ducks and three goats
d. 7 ducks and seven goats

1. 2x + 3y =22

y=4

C. (5,4)

2. y=0

-5x - 2y = -15

B. (3,0)

Step-by-step explanation:

2x+(3)(4)=22

Step 1: Simplify both sides of the equation.

2x+12=22

Step 2: Subtract 12 from both sides.

2x+12−12=22−12

2x=10

Step 3: Divide both sides by 2.

2x/2 = 10/2

x=5

−5x−(2)(0)=−15

Step 1: Simplify both sides of the equation.

−5x−(2)(0)=−15

−5x+0=−15

(−5x)+(0)=−15(Combine Like Terms)

−5x=−15

−5x=−15

Step 2: Divide both sides by -5.

−5x/−5 = −15/−5

x=3

cut 138 centimeters off

step-by-step explanation:

250-112 = 138

plants store their excess carbohydrate in the form of starch so that it could be used as energy source later on. the excess carbohydrate is converted into starch in the plastid i.e. chloroplast & this process occurs in the presence of sunlight. it is an insoluble polymer of glucose which gets stored in cell organelles named as amyloplasts. in some plants, starch is also stored in roots and embryos.