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3 years ago

Consider the following expression -2m(m+n-4)+5(-2m+2n)+n(m+4n-5) which of the following is an equivalent expression

Mathematics

1 answer:

velikii [3]3 years ago

3 0

The answer is:

-2m²+4n²-mn-2m+5n

aka letter c in algebra nation

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3) Solve each equation using the quadratic formula. Show<br> a. x2 – 3x – 10 = 0

Naya [18.7K]

Answer:

Step-by-step explanation:

The quadratic formula of a quadratic equation

$ax^2+bx+c=0\\\\\text{If}\ b^2-4ac>0\ \text{then the equation has two solutions}\ x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}$

$\text{If}\ b^2-4ac=0\ \text{then the equation has one solution}\ x=\dfrac{-b}{2a}$

$\text{If}\ b^2-4ac$

We have:

$x^2-3x-10=0\to a=1,\ b=-3,\ c=-10\\\\b^2-4ac=(-3)^2-4(1)(-10)=9+40=49>0\\\\x=\dfrac{-(-3)\pm\sqrt{49}}{2(1)}=\dfrac{3\pm7}{2}\\\\x=\dfrac{3-7}{2}=\dfrac{-4}{2}=-2\\or\\x=\dfrac{3+7}{2}=\dfrac{10}{2}=5$

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3 years ago

Write the following numbers in ascending order (from smallest to largest): 1.2, 3%, 3/5, 0.3, and -1 1/3.

SSSSS [86.1K]

Answer:

-1 1/3, 0.3, 1.2, 3/5, 3,

Step-by-step explanation:

Hope I helped, can I plz have brainliest, ive never gotten one before!

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2 years ago

Can you help me on questions numbers 8 and 9 ASAP?

aleksandrvk [35]

7. e and f
9. c.

sorry didn't understand 8

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3 years ago

15 × u= 135<br> ---------------

NARA [144]

Answer:

15u = 135

Divide both sides by 15

u = 135/15 = 9

U is equal to 9

Hope this helps!

8 0

2 years ago

Read 2 more answers

Write a linear inequality in two variables that has (-1, 3) as a solution but does not have (4,0) as a solution.

Stels [109]

Answer: y ≤ -x + 2

<u>Step-by-step explanation:</u>

There are an infinite number of possible solutions.

Plot the two points, draw any line between them such that the two points are NOT connected, then choose the inequality symbol that shades (-1, 3).

Here is one solution that satisfies the requirements. y ≤ -x + 2

Here is another: y < -x + 3

And another: y > x + 3

And one more: y ≥ x + 4

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3 years ago