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3 years ago

6

Solve the following system of equations. Express your answer as an ordered pair in the format (a,b), with no spaces between the

numbers or symbols.
3x+4y=16
-4x-3y=-19

2 answers:

malfutka [58]3 years ago

7 0

Answer: (4,1)

Step-by-step explanation:

The given system of equations :

$3x+4y=16.............................(1)\\\\-4x-3y=-19...........................(2)$

Multiplying equation (1) by 4 and equation (2) by 3 we get,

$12x+16y=64.............................(3)\\\\-12x-9y=-57...........................(4)$

Add (3) and (4), we get

$7y=7\\\\\Rightarrow\ y=1$

Substitute y=1 in (1), we get

$3x+4(1)=16\\\\\Rightarrow\ 3x=12\\\\\Rightarrow x=4$

Hence, the solution of the given system = (4,1)

Contact [7]3 years ago

4 0

Solve it by substitution. First let's rewrite the first equation (3x+4y=16) so we have y = something, then we'll substitue that in to the other equation.
3x+4y=16
4y=-3x+16
y=-3/4x+4

Now we can substitute this into the other equation.

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emmasim [6.3K]

Answer: $12 less.

Step-by-step explanation:

Given: Ms. Cole pays $2 a month for online banking at her credit union.

In 6 months she will pay = 6 x ($2)

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3 years ago

What is the value of f?<br><br> 6f−12=−4f+6

Xelga [282]

First you had to add by twelve from both sides of equation form.

$6f-12+12=-4f+6+12$

Then simplify.

$6f=-4f+18$

Next, add by four-f from both sides of equation form.

$6f+4f=-4f+18+4f$

Simplify.

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Then you divide by ten from both sides of equation form.

$\frac{10f}{10}= \frac{18}{10}$

Finally simplify by equation.

$f=\frac{9}{5}$

Final answer: $\boxed{f=9/5}$

Hope this helps!

And thank you for posting your question at here on brainly, and have a great day.

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3 years ago

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nata0808 [166]

Answer:

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Step-by-step explanation:

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2 years ago

The profit of a company receives is given by the expression 0.15(855p - 315) where p is the number of problems sold. Rewrite thi

Goryan [66]

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<u><em>Explanation</em></u>

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As $p$ represents the number of products sold, so for finding the profit for 25 products sold and 150 products sold, <u>we need plug $p=25$ and $p=150$ separately into the above expression</u>.

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3 years ago

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avanturin [10]

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$\Large\maltese\underline{\textsf{A. What is Asked}}$

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2 years ago