2 years ago

Matrices question need help

Mathematics

1 answer:

Mashcka [7]2 years ago

6 0

Answer:

plzz mark me brainliest

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What is the value of x?

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X is a variable and can represent any number that is unknown

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3 years ago

What number should be added to 77 to make the sum 0?

Lina20 [59]

77 + x = 0

so x = -77

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There were 300 seats in the school gym. Of the all the seats 120 had stripes and the rest had polka dots on them. What percentag

iragen [17]

300-120 = 180
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So 60%

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3 years ago

Select and use the most direct method to solve 2x(x + 1.5) = -1. Describe and justify the methods you used to solve the quadrati

miskamm [114]

Step-by-step explanation:

Given that,

A quadratic equation,

2x(x + 1.5) = -1

We need to solve the quadratic equation. Firstly we need to simplify the above equation to form it as $ax^2+bx+c=0$ .

So,

$2x^2+3x=-1\\\\2x^2+3x+1=0$

Here, a = 2, b = 3 and c = 1

The roots of the given equation can be given by :

$x=\dfrac{-b\pm \sqrt{b^2-4ac} }{2a}$

Putting all the values we get :

$x=\dfrac{-b\pm \sqrt{b^2+4ac} }{2a}, \dfrac{-b\pm \sqrt{b^2-4ac} }{2a}\\\\x=\dfrac{-3\pm \sqrt{3^2+4(2)(1)} }{2(2)}, \dfrac{-3\pm \sqrt{3^2-4(2)(1)} }{2(2)}\\\\x=\dfrac{-3+1}{4}, \dfrac{-3-1}{4}\\\\x=-\dfrac{1}{2}, -1$

So, the roots of the given equation is -1/2 and -1.

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3 years ago

Find the surface area of the prism.

anygoal [31]

Answer:

220 I'm pretty sure because 6×5 is 30 times 2 is 60. Then do 6×10 equals 60. Then do 5 times 10 times 2 to get 100. Then you add it all up to get 220

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3 years ago

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