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kodGreya [7K]
3 years ago
11

What is 2x+y=0 5x+3y=-11

Mathematics
1 answer:
miv72 [106K]3 years ago
4 0

2x+y=0\qquad\text{subtract 2x from both sides}\\\\y=-2x\\\\\text{Put it to the second equation}\ 5x+3y=-11:\\\\5x+3(-2x)=-11\\\\5x-6x=-11\\\\-x=-11\qquad\text{change the signs}\\\\\boxed{x=11}\\\\\text{Put the value of x to the first equation:}\\\\y=-2(11)\\\\\boxed{y=-22}\\\\Answer:\ \boxed{x=11\ and\ y=-22}

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Find the area pf a trapezoid with a base of 26.7 ft , a height of 15.4 and top of 9.9 ft
evablogger [386]
Hello!

To find the area of the trapezoid, you use the formula A=1/2h(a+b), where a and b represent the two base lengths.

Since we already know the two bases and the height, we can just plug them into the equation to find the area.

A=1/2·15.4(26.7+9.9)
A=1/2·15.4(36.6)
A=1/2·563.64
A=281.82

The area is 281.82 ft².

I hope this helps!
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3 years ago
Please help it’s due today. Stay safe! :) (:
Naya [18.7K]

Answer:

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Step-by-step explanation:

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3 years ago
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n200080 [17]
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6 0
3 years ago
Can someone please help me
Nikolay [14]

Answer:

B

Step-by-step explanation:

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Therefore (x+1)²=20

6 0
3 years ago
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The answer is 15625

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3 years ago
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