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3 years ago

2x-y=3; x=2 how do I solve this

Mathematics

1 answer:

Solnce55 [7]3 years ago

8 0

2x-y=3

use the substitution method

2(2)-y= 3

4-y= 3

move 4 to the other side

sign changes from +4 to -4

4-4-y= 3-4

-y= 3-4

-y=-1

mutiply both sides by -1 to get +y

(-1)(-y)= (-1)(-1)

y= (-1)(-1)

Answer: y= 1

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<h3><u>Solution:</u></h3>

We need to determine the cost of serving 40 people with rice

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The price of 1 pound box will be $\frac{\$ 1.99}{2}=\$ 0.995$

1 Pound (lb) is equal to 16 ounces (oz)

Therefore, the price of 16 ounces is $0.995

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$\begin{array}{l}{\text { The cost per person is } \frac{\$ 0.995}{16} \times 7=\$ 0.44} \\\\ {\text { The cost for serving } 40 \text { people }=\$ 0.44 \times 40=\$ 17.6}\end{array}$

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3 years ago

What is the slipe of (-1,3) and (1,3) ?

Minchanka [31]

Answer:

0 theres no slope lol cause

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3 years ago

A wheelbarrow has a wheel with a diameter of 10 inches. What is the distance, in inches, that the

DIA [1.3K]

Answer:

Step-by-step explanation:

Using the formula for finding the circumference of a circle.

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radius = diameter/2

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radius = 5in

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C = 20(3.14)

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2 years ago

At the beginning of the semester students reported that they spend an average of 5 hours per day watching television, decreasing

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Answer:

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(b) $X(t)=X(0)+\Delta X*t=1+0.5*t$

Step-by-step explanation:

a) For the students, they start at X(0)=5 h and ΔX=-0.5 h/week.

We can write

$X(t)=X(0)+\Delta X*t=5-0.5*t$

b) For the professors, they start at X(0)=1 h and ΔX=+0.5 h/week.

We can write

$X(t)=X(0)+\Delta X*t=1+0.5*t$

c) The seew which they will be watching the same amount of hours will be the 4th week.

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The amount of hours will be

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2 years ago

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s2008m [1.1K]

Answer:

$log_{17}52.875 = log_{10}52.875 : log_{10}17}$

Step-by-step explanation:

Given

$log_{17}(52.875)$

Required

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To do this, we make use of the following logarithm laws;

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In the given parameters;

$a = 52.875$

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Substitute these values in $log_ba = \frac{log_{10}a}{log_{10}b}$

$log_{17}52.875 = \frac{log_{10}52.875}{log_{10}17}$

Represent as a ratio

$log_{17}52.875 = log_{10}52.875 : log_{10}17}$

Hence;

$log_{17}(52.875)$ is represented as $log_{17}52.875 = log_{10}52.875 : log_{10}17}$

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2 years ago