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4 years ago

What is the solution to x + 9 = -18

Mathematics

2 answers:

adoni [48]4 years ago

8 0

Answer: x= -27

Step-by-step explanation: subtract 9 from both sides to get x by itself

zavuch27 [327]4 years ago

8 0

Answer:

X=-27 Should be the answer

Step-by-step explanation:

Subtract 9 from both sides of the equation

X = -18 - 9

Subtract 9 from -18

X = -27

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Would 2+6x^2-2x be monomial, binomial or trinomial?

Vedmedyk [2.9K]

Answer:

Trinomial

Step-by-step explanation:

Because it has 3 terms.

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2 years ago

To find the roots of the function, set y = 0. The equation is 0 = 4x2 + 2x – 30.

Assoli18 [71]

Answer:

x = - 3, x = $\frac{5}{2}$

Step-by-step explanation:

Given

4x² + 2x - 30 = 0 ( divide through by 2 )

2x² + x - 15 = 0

Consider the factors of the product of the x² term and the constant term which sum to give the coefficient of the x- term.

product = 2 × - 15 = - 30 and sum = + 1

The factors are + 6 and - 5

Use these factors to split the x- term

2x² + 6x - 5x - 15 = 0 ( factor the first/second and third/fourth terms )

2x(x + 3) - 5(x + 3) = 0 ← factor out (x + 3) from each term

(x + 3)(2x - 5) = 0

Equate each factor to zero and solve for x

x + 3 = 0 ⇒ x = - 3

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4 years ago

If Maria designs a function to predict the amount of revenue, r, generated as a function of the number of people, n, who attend

Katarina [22]

Answer:

Only whole numbers of people, n, are assumed in the calculation.

Step-by-step explanation:

The function relating the number of people, n, to the revenue, r, implicity assumes that only whole people will purchase tickets. 13.5 would mean that 13 normal people and 1/2 of a person bought tickets. This can't be in the domain, since the ticket saleperson would run away if 1/2 of a person showed up: thus no ticket sale.

Actually, it may depend on how one defines a person. Is it 1/2 physically, or 1/2 mentally? I've personally seen the latter show up at some fundraisers.

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3 years ago

Determine whether each of these sets is nite, countably in nite, or uncount- able. For those that are countably in nite, exhibit

ira [324]

Answer:

Integers that are divisible by 7 are countably infinite

The set are {7, 14, 21, 28, 35, 42, 49,......

Integers that are divisible by 10 are countably infinite

The set are {10, 20, 30, 40, 50, 60, 70,........

Also for the negative integers divisible by 7 or 10{.......,-49, -42, -35, -28, -21, -14, -7} or {........,-70, -60, -50, -40, -30, -20, -10} are countably infinite

Step-by-step explanation:

See the set of integers divisible by 7 or 10,

{7, 14, 21, 28, 35, 42, 49,........} Or

{10, 20, 30, 40, 50, 60, 70,.......}

Can be map one-to-one to {1,2,3,4,5,6,7,...... The set of natural numbers or positive Integers.

So also, it is applicable in negative integers divisible by 7 or 10.

Therefore, they are countably infinite

A set is uncountable if it contains so many elements that they cannot be put in one-to-one correspondence with the set of natural numbers(Positive Integers). In other words, there is no way that one can count off all elements in the set in such a way that, even though the counting will take forever, you will get to any particular element in a finite amount of time.

WHILE

A set is countable or countably finite if it contains so many elements that they CAN be put in one-to-one correspondence with the set of natural numbers(Positive Integers)

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3 years ago

Emily has 50 gallons of water to share between 6 different fish tanks. She puts an equal amount of water in each fish tank. What

IrinaK [193]

Answer:

25/3 or 8.333... gallons in each tank

Step-by-step explanation:

Step 1: Divide to see how much gallons in each tank

50 / 6

25/3 or 8.333...

Answer: 25/3 or 8.333... gallons in each tank

6 0

4 years ago

Read 2 more answers

What is the solution to x + 9 = -18​

What is the solution to x + 9 = -18