4 years ago

2mn + 4n 2 and 5m 2 - 7mn

1 answer:

3 0

$(2mn+4n^2)+(5m^2-7mn)\\\\=2mn+4n^2+5m^2-7mn\qquad\text{combine like terms}\\\\=5m^2+(2mn-7mn)+4n^2\\\\=\boxed{5m^2-5mn+4n^2}\to 3)$

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Which property is used in the following expression ? (a x b) x c = a x (b x c)

Firlakuza [10]

A- Associative Property of Multiplication

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3 years ago

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What is this answer?

Korvikt [17]

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4 years ago

WEDNESDAY: Use the quadratic formula to solve the following: 3x^2 - 6x-12 = 0*

Pepsi [2]

Answer:

a.) 3.236 or -1.236

Step-by-step explanation:

Used an online calculator for this answer...

Using the Quadratic Formula where

$x = \frac{ -b \pm \sqrt{b^2 - 4ac}}{ 2a }\\x = \frac{ -(-6) \pm \sqrt{(-6)^2 - 4(3)(-12)}}{ 2(3) }\\x = \frac{ 6 \pm \sqrt{36 - -144}}{ 6 }\\x = \frac{ 6 \pm \sqrt{180}}{ 6 }$

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so, there are two real roots.

Simplify the radical...

$x = \frac{ 6 \pm 6\sqrt{5}\, }{ 6 }\\x = \frac{ 6 }{ 6 } \pm \frac{6\sqrt{5}\, }{ 6 }\\x = 1 \pm \sqrt{5}\,$

This simplifies to...

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3 0

4 years ago

A survey found that 6 out of 8 students own a pet. If there are 320 students in a school, what is a reasonable prediction for th

Anna [14]

Answer: 240 students

Explanation:

320 ÷ 8 = 40 (40 groups of 8)

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3 years ago

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If 2p°and ( p+15)are a pair of complementary angles find them.

Andrej [43]

Answer:

angles r 50°&40°

Step-by-step explanation:

2p+p+15=90°
3p=90°-15°
3p=75°
p=75°/3
p=25°

2p=2×25=50°

p+15=25+15=40°

<h3>stay safe healthy and happy.</h3>

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3 years ago