3 years ago

Solve system of equations

Mathematics

2 answers:

sergey [27]3 years ago

8 0

The answer to your question is (1,9) :)

gulaghasi [49]3 years ago

8 0

(1,9) sorry if I’m wrong

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I need to know give 20 points to who answers this right.

NISA [10]

Step-by-step explanation:

I believe it's 16 1/2. I just used MathPapa lol.

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3 years ago

7 What is the value of the expression -3x^2 y +4x when x = -4 and y = 2

love history [14]

-3x^2 y +4x
 =-3(-4)^2 (2) + 4(-4)
=-96-16
=-112

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4 years ago

Patti's Pet Palace has an 85-gallon fish tank. When it needs to be cleaned, it can be drained at a rate of 2 gallons per minute.

QveST [7]

Answer:

c y=2x-85 I think so please check if I'm wrong

I think c

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3 years ago

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Kenji simplifies 3^5 x 4^ 5and gets the result 12^10, but Darlene is not sure. Is Kenji correct? Justify your answer.

V125BC [204]

That's a question about exponentiation.

Answer:

Kenji is wrong because he does not aply the porperty correctly.

Step-by-step explanation:

A exponetiation has this form:

$\boxed{a^b}$

a is the base

b is the power or exponent

To understand that situation it's important to know a property about exponentiation. When we have a multiplication with the same exponent and diferent bases, the result is the multiplication of the bases with the same exponent. Let's see this above, in mathematical language:

$\boxed{a^b \cdot c^b = (a\cdot c) ^b}$

Examples:

$2^3 \cdot 8^3 = (2 \cdot 8) ^3 = 16^3$

$10^9 \cdot 23^9 = (10 \cdot 23) ^9 = 230^9$

Now, we can say why Kenji is wrong. It's easy simplify $3^5 \cdot 4^5$ ! We know that the result is $(3 \cdot 4) ^5 = 12^5$ , but Kenji multiplied the bases and added the exponents, that's why he is wrong.

I hope I've helped. ^^

Enjoy your studies! \o/

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3 years ago

What is 2/5 as a decimal?

lara31 [8.8K]

2/5 in decimal form would be 0.4

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3 years ago

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