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3 years ago

Please answer both questions

Mathematics

1 answer:

romanna [79]3 years ago

7 0

Answer:

D. 45

Step-by-step explanation:

1. The solution to the question above is answered in the attached picture.

2. Liz is wrong for choosing option C as answer. Liz actually performed this operation to get 30: 1.5 × 5 × 4 = 30.

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What type of solutions does this equation have?

Oksi-84 [34.3K]

Answer:

one real solution

Step-by-step explanation:

square root of 0 is 0

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3 years ago

I need help please and thank you

myrzilka [38]

Answer:

Step-by-step explanation:

Slope = y2- y1/ x2- x1

= 4 - (-2) / 3 -1

= 4+2/ 2

=6/2 = 3

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3 years ago

What is the answer to 7x+5-8x

Svet_ta [14]

Combine like terms. Remember that like terms are terms that are completely the same excluding the coefficient.

7x-8x=-1x

Final answer: -x+5

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3 years ago

Which of the following is an extraneous solution of (45-3x)^1/2=x-9?

Iteru [2.4K]

Answer:

C. x =3

Step-by-step explanation:

Extraneous solution is that root of a transformed equation that doesn't satisfy the equation in it's original form because it was excluded from the domain of the original equation.

Let's solve the equation first

$\sqrt{45-3x} = x-9\\Taking\ square\ on\ both\ sides\\{(\sqrt{45-3x})}^2 = {(x-9)}^2\\45-3x = x^2-18x+81\\0 = x^2-18x+81-45+3x\\x^2-15x+36 = 0\\x^2-12x-3x+36 = 0\\x(x-12)-3(x-12) = 0\\(x-3)(x-12)\\x-3 = 0\\=> x =3\\x-12 = 0\\x = 12\\We\ will\ check\ the\ solutions\ one\ by\ one\\So,\\for\ x=3\\\sqrt{45-3(3)} = 3-9\\\sqrt{45-9} = -6\\\sqrt{36}= -6\\6\neq -6\\For x=12\\\sqrt{45-3(12)} = 12-9\\\sqrt{45-36} = 6\\\sqrt{36}= 6\\6=6$

Hence, we can conclude that x=3 is an extraneous solution of the equation ..

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4 years ago

Starting with $800 and losing 5% each? is it linear or exponential growth or decay. also solve

kati45 [8]

Answer:

Decay

Step-by-step explanation:

The money is being lost, so it is decaying

5 0

3 years ago