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4 years ago

Is a = 2.4 a solution to the equation below? Show why or why not. 9a-3 = 4a +9

Mathematics

1 answer:

Tanzania [10]4 years ago

4 0

Answer:

Yes

Step-by-step explanation:

Both equations equal 18.6. Just plug in 2.4 for a to check

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Please helppppppppppp me so the problem its jessica said that the sum of −8+d is always positive when the value of d is greater

Alex_Xolod [135]

<h3>Answer: Sometimes true</h3>

========================================================

Explanation:

-8+d is positive only when d > 8

Here's why

-8+d > 0

-8+d+8 > 0+8 .... add 8 to both sides

d > 8

So if Jessica said "d is greater than 8", then her claim would always be correct.

However, her claim is sometimes true.

Two counter examples could be when d = 1 and d = 2.

If d = 1, then -8+d = -8+1 = -7 which isn't positive.

If d = 2, then -8+d = -8+2 = -6 which also isn't positive.

Basically if d is anything smaller than 8, then you'll have -8+d be negative.

If d is something larger than 8, say d = 9, then -8+d = -8+9 = 1 which is finally positive.

4 0

3 years ago

Can override the brain's other functions. A. Emotions B. Smells C. Music D. Calmness

mr Goodwill [35]

Emotions because they make you want to make decisions that you wouldn’t make normally

3 0

4 years ago

Read 2 more answers

What are all natural number factors of 130

harina [27]

1, 2, 5, 10, 13, 26, 65, 130 are the natural number factors of 130.

3 0

3 years ago

Which table shows the relationship y = 50x?

VikaD [51]

Answer:

$\displaystyle y = \frac{4}{5}x$

B. x 1 3 4 5

y 50 150 200 250

Step-by-step explanation:

First, find the rate of change [slope]:

$\displaystyle \frac{-y_1 + y_2}{-x_1 + x_2} = m \\ \\ \frac{0 + 24}{0 + 30} = \frac{24}{30} = \frac{4}{5} \\ \\ y = \frac{4}{5}x$

We can write the equation from here, since both the x-intercept and y-intercept are at the origin.

_______________________________________________

Now, all you have to do is input each value into the function to confirm their authenticities. Once you do this, you WILL arrive at answer choice B).

I am joyous to assist you anytime.

4 0

4 years ago

Given sin theta=5/13 and cos theta=12/13, which of the following can be proven using a Pythagorean identity?

ZanzabumX [31]

Answer:

4th option

Step-by-step explanation:

given

sinΘ = $\frac{5}{13}$ and cosΘ = $\frac{12}{13}$ , then

( $\frac{5}{13}$ )² + ( $\frac{12}{13}$ )²

= $\frac{25}{169}$ + $\frac{144}{169}$

= $\frac{25+144}{169}$

= $\frac{169}{169}$

= 1

showing sin²Θ + cos²Θ = 1

4 0

2 years ago