The ninth grade class has a total of 450 students made up of x girls and y The number of girls minus twice the number of boys is 18. Find the number of girls are in the ninth grade. Which system of equations and solution represent this situation?
Multiple choice question.

A)
x+y=450
and x−2y=18
; There are 234 girls in the ninth grade.

B)
x+y=450
and x−2y=18
; There are 306 girls in the ninth grade.

C)
x+y=450
and 2x−y=18
; There are 156 girls in the ninth grade.

D)
x−y=18
and 2x−y=18
; There are 162 girls in the ninth grade.

maximum area = xy = (16)(32) = 512 ft2

to maximize the area of the garden, the side of the fence parallel to the side of the house should be 32 ft long, and the other two sides should both have length 16 ft.'

source

find the magnitude of the trig term  

csc

(

x

)

−

1

by taking the absolute value of the coefficient.

1

find the lower bound of the range.

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y

=

−

2

find the upper bound of the range.

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y

=

0

the range is  

y

≤

−

2

or  

y

≥

0

.

(

−

∞

,

−

2

]

∪

[

0

,

∞

)

{

y

|

y

≤

−

2

,

y

≥

0

}

step-by-step explanation:

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb

irrational, then, just means all the numbers that aren't rational. every integer is a rational number, since each integer n can be written in the form n/1. however, numbers like 1/2, 45454737/2424242, and -3/7 are also rational, since they are fractions whose numerator and denominator are integers.

step-by-step explanation: