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3 years ago

I need help with this please

Mathematics

1 answer:

mezya [45]3 years ago

4 0

Answer:

answer is b

Step-by-step explanation:

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True or false: Metals are usually found in covalent compounds

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Answer: True

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3 years ago

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What is the sum of 1/9, 2/3, and 5/18?<br> A. 121<br> B.4/15<br> C. 19/18<br> D. 8/30

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2 years ago

Milan spent a total of $25 at the grocery store, of this amount he spent $10 on fruit. What percentage did he spend on fruit?

muminat

Answer:

40%

Step-by-step explanation:

You do 10/25 and to make that a fraction you have to make the denominator 100 so we multiply the numerator and denominator by 4. Which gets us 40/100 or 40%.

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1 year ago

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geniusboy [140]

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2 years ago

Prove that the lines x+y=5, 2x–y=16 and x+2y=3 intersect at one point. What are the coordinates of this point?

statuscvo [17]

Answer:

The coordinates of the intersection point are $(7,-2)$

Step-by-step explanation:

we have

$x+y=5$ -----> equation A

$2x-y=16$ -----> equation B

$x+2y=3$ -----> equation C

we know that

If the system of equations intersect at one point, then the system of equations has one solution

using a graphing tool

see the attached figure

The coordinates of the intersection point are $(7,-2)$

This point is a common solution for the three equations

Verify

Substitute the value of $x=7, y=-2$ in each equation

Equation A

$x+y=5$

$7-2=5$

$5=5$ ----> is true, therefore the point is a solution of the equation A

Equation B

$2x-y=16$

$2(7)+2=16$

$16=16$ ----> is true, therefore the point is a solution of the equation B

Equation C

$x+2y=3$

$7+2(-2)=3$

$3=3$ ----> is true, therefore the point is a solution of the equation C

4 0

2 years ago