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2 years ago

Twice a number is three more than nine

Mathematics

2 answers:

antoniya [11.8K]2 years ago

8 0

answer: how we supposed to do it?

Step-by-step explanation:

i don't even understand

KonstantinChe [14]2 years ago

5 0

Answer:

Step-by-step explanation:

Let that number be <em>x</em>.

$2x = 9 + 3$

$2x = 12$

$x = 6$

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stich3 [128]

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2 years ago

F(x)=-9x^2-2x and g(x)=-3x^2+6x-9, find (f-g)(x) and (f-g)(-4)

Alona [7]

Answer:

(f - g)(x)= - 6 {x}^{2} - 8x + 9

(f - g)(-4!)= - 55

Step-by-step explanation:

$f(x) = - 9 {x}^{2} - 2x, \: \: g(x) = - 3 {x}^{2} + 6x - 9 \\ (f - g)(x) = f(x) - g(x) \\ = - 9 {x}^{2} - 2x - (- 3 {x}^{2} + 6x - 9) \\ = - 9 {x}^{2} - 2x + 3 {x}^{2} - 6x + 9 \\ \purple{ \boxed{ \bold{(f - g)(x)= - 6 {x}^{2} - 8x + 9}}} \\ (f - g)( - 4)= - 6 {( -4 )}^{2} - 8( - 4) + 9 \\ = - 6 \times 16 + 32 + 9 \\ = - 96 + 41 \\ \red{ \boxed{ \bold{(f - g)( - 4)= - 55}}}$

6 0

2 years ago

How do I find X in this problem

pogonyaev

You know that BC is congruent to x so you need to solve for x using the ratio:
$\frac{12}{24}=\frac{x}{BC}$

So then we need to find BC.

We know:
$A=\frac{base \times height}{2}$
$28=\frac{BC \times 7}{2}$
Therefore BC =8

Then:
$\frac{12}{24}=\frac{x}{8}$
$x=8 \times \frac{12}{24} = 4$

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2 years ago

What is 12.357 in expanded form

Andrew [12]

Answer:

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Step-by-step explanation:

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2 years ago

Nine different numbers between 10 and 200 that have a sum of their digits equal.to 6

Lady bird [3.3K]

One answer (of several) would be 33: It's between 10 and 200 and the sum of its digits is 6. Continue this same pattern to identify other answers.

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2 years ago

Twice a number is three more than nine​

Twice a number is three more than nine