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3 years ago

Please answer the blanks

Mathematics

2 answers:

Nadya [2.5K]3 years ago

6 0

Answer:

5/6=10/12 10/12=5/6 3/12=1/4 3/4=9/12

shtirl [24]3 years ago

5 0

5/6=10/12
10/12=5/6
3/12=9/4
3/4=9/12

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Select the correct answer. Which set of coordinates satisfies the equations x − 2y = -1 and 2x + 3y = 12? A. (1, 2) B. (3, 1) C.

alekssr [168]

Answer:

The coordinates that satisfy the equations will be: (3, 2)

Hence, option C is correct.

Step-by-step explanation:

Given the equations

$x\:-2y\:=-1;\:2x\:+\:3y=12$

solving the equations to find the solution values (coordinates)

$\begin{bmatrix}x-2y=-1\\ 2x+3y=12\end{bmatrix}$

$\mathrm{Multiply\:}x-2y=-1\mathrm{\:by\:}2\:\mathrm{:}\:\quad \:2x-4y=-2$

$\begin{bmatrix}2x-4y=-2\\ 2x+3y=12\end{bmatrix}$

$2x+3y=12$

$-$

$\underline{2x-4y=-2}$

$7y=14$

$\begin{bmatrix}2x-4y=-2\\ 7y=14\end{bmatrix}$

solve for y

$7y=14$

$y=2$

$\mathrm{For\:}2x-4y=-2\mathrm{\:plug\:in\:}y=2$

$2x-4\cdot \:2=-2$

$2x=6$

$\mathrm{Divide\:both\:sides\:by\:}2$

$\frac{2x}{2}=\frac{6}{2}$

$x=3$

$\mathrm{The\:solutions\:to\:the\:system\:of\:equations\:are:}$

$x=3,\:y=2$

Therefore, the coordinates that satisfy the equations will be: (3, 2)

Hence, option C is correct.

7 0

3 years ago

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How many seconds are in 20 days math ??

navik [9.2K]

Answer:

1,728,000

Step-by-step explanation:

there are 86400 seconds in a day so you have to multiply 86400 times 20

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4 years ago

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baherus [9]

1. Johann walked 1.2 feet every second.
Find the total feet that Johann walked for 5 seconds.
First, let’s have the given numbers:
=> 1.2 feet
=> 5 second
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=> 1.2 feet x 5 seconds
=> 6, Thus, Johan walked 6 feet in 5 seconds.
Unit Rate = 1.2 / ft
Unit rate = 6 feet / 5 seconds

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3 years ago

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Scilla [17]

Maximum value = 880/3.

Maximizing the objective function in the LP model means that the value occurs in an acceptable set of decisions. Linear programming refers to selecting the best alternative from the available alternatives that can represent the objective and constraint functions as linear mathematical functions.

As mentioned above, the equation is an example of a constraint. You can use this to think about what it means to solve equations and inequalities. For example, solving 3x + 4 = 10 yields x = 2. This is an easy way to express the same constraints.

Learn more about constraints here: brainly.com/question/8729359

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2 years ago

If f(x) = -2(5)^x , what if f(2)

BaLLatris [955]

Answer:

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Step-by-step explanation:

Put 2 where x is and do the arithmetic.

f(2) = -2(5^2) = -2(25) = -50

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3 years ago