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3 years ago

15

-4x+3x=2 solve is equation

1 answer:

solong [7]3 years ago

7 0

Answer:

x= -2

Step-by-step explanation:

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The total cost, c, in dollars, of b bottles of water is c = 1.1b. What is the constant of proportionality?

spayn [35]

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8 batches

Step-by-step explanation:

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3 years ago

A poster is to have an area of 210 in2 with 1 inch margins at the bottom and sides and a 2 inch margin at the top. find the exac

slavikrds [6]

Let

x-------> the length side of the poster

y-------> the width side of the poster

we know that

Area of the poster is equal to

$210=x*y\\\\ y=\frac{210}{x}$ -------> equation $1$

Area of the printed area is equal to

$Aprinted=(x-2)*(y-3)\\ Aprinted=xy-3x-2y+6$ ----> equation $2$

substitute equation $1$ in equation $2$

$Aprinted=[210]-3x-2*[\frac{210}{x}]+6$

using a graph tool

Find the vertex of the graph

The vertex of the graph is the point that represent the value of x for the largest printed area

see the attached figure

the vertex is the point $(11.83,145)$

the largest printed area is $145 in^{2}$

$x=11.83 in$

find the value of y

$y=\frac{210}{x} \\ \\ y=\frac{210}{11.83} \\ \\ y=17.75in$

therefore

the answer is

The dimensions of the poster are $11.83 in x 17.75 in$

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Step-by-step explanation:

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What does "B" equal to?

jolli1 [7]

Subtract 3/5b from both sides
8/5b+2=10
subtract 2 from both sides
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b=5

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3 years ago