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velikii [3]
4 years ago
6

Joyce is buying supplies at the school bookstore. A pencil costs $0.25, a notebook costs $1.75, and a piece

Mathematics
2 answers:
makvit [3.9K]4 years ago
4 0

Let Pencils be P

Let notebooks be N

Let graph paper be G

Let cost be C

(Always write a let statement before you write and algebraic equation)

C= (Px0.25)+(Nx1.75)+(Gx0.05)

White raven [17]4 years ago
3 0

Answer:

C = 0.25x +1.75y +0.05z in dollars

Step-by-step explanation:

Let 'x' be the number of pencils, 'y' be the number of notebooks, and 'z' be the  number of graph papers bought. Then the total cost 'C' in dollars should be:

C = 0.25x +1.75y +0.05z

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Both roots of x^2 + Nx + 144 are equal to each other. Find all the possible values of N.
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Answer:

N=+24,-24

Step-by-step explanation:

Well this is a quadratic equation and we can make further deductions using it's discriminant

b²-4ac=0

N²-4(1×144)=0

N²-576=0

N²=576

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N=+24,-24

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Explanation
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Find x and y, given that KL and line MN are parallel. Show all work
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\dfrac{|MK|}{|KJ|}=\dfrac{|NL|}{|LJ|}\\\\\dfrac{x-2}{5}=\dfrac{12}{8}\ \ \ \ |cross\ multiply\\\\8(x-2)=5\cdot12\\\\8x-16=60\ \ \ |+16\\\\8x=76\ \ \ |:8\\\\\boxed{x=9.5}
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C

Step-by-step explanation:

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