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user100 [1]
3 years ago
6

5x+6y=13;-5x+2y=11. how do I solve this

Mathematics
1 answer:
Wittaler [7]3 years ago
8 0
You solve for X in one equation and plug it into the other. So... 

<span>5x+6Y=13 </span>
<span>5x=13-6Y </span>
<span>x=(13-6Y)/5 </span>

<span>Then, you replace X in the other equation... </span>

<span>-5x+2y=11 </span>
<span>-5[(13-6y)/5]+2y=11 </span>
<span>-13+6y+2y=11 </span>
<span>8y=11+13 </span>
<span>8y=24 </span>
<span>y=3 </span>

<span>Now that you have Y, you just solve for x using either equations... </span>

<span>5x+6(3)=13 </span>
<span>5x=13-18 </span>
<span>5x=-5 </span>
<span>x=-1 </span>

<span>Therefore, X = -1 & Y = 3

</span>
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Your answer is C.
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8 0
3 years ago
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Jaclyn's company required an initial investment of $2,125 for starting costs and sells construction toys for $49.99 each. Richie
Darina [25.2K]

The the number of construction toys that must be bought so that the profit for Jacelyn's company and Richie's company is the same. is t= 204.3269230769231

<h3>what is equation?</h3>

Equations are mathematical statements containing two algebraic expressions on both sides of an 'equal to (=)' sign. It shows the relationship of equality between the expression written on the left side with the expression written on the right side. In every equation in math, we have, L.H.S = R.H.S (left hand side = right hand side). Equations can be solved to find the value of an unknown variable representing an unknown quantity. If there is no 'equal to' symbol in the statement, it means it is not an equation. It will be considered as an expression.

As, per the given situation the equation can be

2125 + 49.99 t = 39.95 t

10.4 t= 2125

t= 2125 / 10.4

t= 21250/104

t= 204.3269230769231

Learn more about equation here:

brainly.com/question/10413253

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6 0
2 years ago
A cheetah can travel three hours at top speed for 225 miles how many miles per hour?
jolli1 [7]

Answer:

The answer is 75 miles per hour

Step-by-step explanation:

225÷3=75 ( how many times 3 go into 225)

We can check to see if this answer is correct by multiplying 75 by 3 ( multiply 75 three times)

75×3=225

There for 75 is the correct answer

(I hope this helped you answer your question. If you want to check if I'm correct you can use a calculator! Have a wonderful day!)

:)

6 0
3 years ago
Is it possible for a segment to have more than one bisector? Explain your reasoning.
lord [1]
Yes.

A bisector of a line segment is a line which divides the line segment into two equal parts.
A bisector of a line can divide the line in many different ways forming different angles.
A bisector is said to be a perpendicular bisector if the angle at the intersection of the two lines is 90 degrees.
But, there are several other bisectors that are not perpendicular bisectors.

Therefore, <span>it is possible for a segment to have more than one bisector.</span>
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3 years ago
How many quaters are in 4 and 3 over 4
gulaghasi [49]

Answer:

19

Step-by-step explanation:

If you're asking how many quarters in 4 3/4

In 1 there are 4 quarters so do 4 multiplied by the 4 quarters which is 16. In 3/4 we have 3 quarters so 16 add the 3 is 19.

5 0
3 years ago
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