Answer: the cost of each bush is $15
the cost of each flower is $2
Step-by-step explanation:
Let x represent the cost of each bush.
Let y represent the cost of each flower.
Portia bought 12 bushes and 30 flowers for $240 to plant in her yard. This is expressed as
12x + 30y = 240- - - - - - - - - - -1
Later, she realized she did not have enough plants and bought 7 more bushes and 10 more flowers for $125. This is expressed as
7x + 10y = 125- - - - - - - - - - -2
Multiplying equation 1 by 7 and equation 2 by 12, it becomes
84x + 210y = 1680
84x + 120y = 1500
Subtracting, it becomes
90y = 180
y = 180/90
y = 2
Substituting y = 2 into equation 1, it becomes
12x + 30 × 2 = 240
12x + 60 = 240
12x = 240 - 60 = 180
x = 180/12
x = 15
Answer:
the scientific name is the same name around the world and if you use common names they are different around the world
Step-by-step explanation:
Answer:
$3.50 a gallon
Step-by-step explanation:
<em>Subtract The Cost Of The Toll From Total Amount</em>
15.50 - 5 = 10.50
<em>Divide The Total Cost Of Gas By Each Gallon</em>
10.50 / 3 = 3.50
Answer:
Circumference of a circle A =
Area of a circle A = 12081.1 square inches
Step-by-step explanation:
Let denotes radius of circle B.
Circle A has a radius that is five more than twice as long as the radius of circle B.
So,
Radius of circle A =
Diameter of circle = 2 (radius of circle)
So,
Diameter of circle B = 2r
Diameter of circle A =
Sum of the diameters of the circles A and B =
As sum of the diameters of the circles is 88 inches,
inches
Radius of a circle A =
inches
Let R denotes radius of a circle A.
R = 62 inches
Circumference of a circle
Area of a circle square inches
Answer:
3 a^(-2)
3 / a^2
Step-by-step explanation:
(3a) (a^-3)
Multiply
3 a^1 * a^-3
Since we are multiplying, we add the exponents
3 a^ ( 1-3)
3 a^(-2)
If you are not supposed to leave a negative exponent
x^-b = 1 / x^b
3 / a^2