3 years ago

What are Numbers? Why do we need them?

Mathematics

1 answer:

il63 [147K]3 years ago

3 0

A number is a mathematical object used to count, measure, and label

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What quadratic equation has -4 and 2/3 as it’s roots

umka21 [38]

Answer:

3x^2 + 10x - 8 = 0.

Step-by-step explanation:

In factor form it would be:

(x + 4)(3x - 2) = 0 (because x + 4 = 0 gives x = -4 and 3x - 2 = 0 gives x = 2/3);

Now change to standard form:

= 3x^2 - 2x + 12x - 8 =0

= 3x^2 + 10x - 8 = 0.

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3 years ago

Abcd is a parallelogram. its diagonal, ac, is 18 inches long and forms a 20° angle with the base of the parallelogram. angle abc

madam [21]

I really need this answer

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3 years ago

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SOMEONE PLEASE HELP ME WITH THIS QUESTION !!!

tatuchka [14]

Answer:

$700

Step-by-step explanation:

Given that:

Cost of desktop PC 10 years ago = $6000

Cost of desktop PC 2 years ago = $300

Linear model applies.

To find the rate of decrease per year, we need to find the slope.

One quantity is cost of PC here and second quantity here is number of years.

$\text{Rate of decrease per year = }\dfrac{\text{Change in Price}}{\text{Change in Number of years}}$

$\Rightarrow \dfrac{6000-300}{10-2}\\\Rightarrow \dfrac{5700}{8}\approx \bold{\$700}$

So, the answer is:

There is a decrease of <em>$700 </em>per year.

Rate of decrease per year is <em>$700</em>.

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3 years ago

How do you simplify 25-4x-15/4

Cloud [144]

Step 1. Collect like terms

$-4x+(25- \frac{15}{4} )$

Step 2. Simplify

$-4x+ \frac{85}{4}$

Done! :)

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3 years ago

PLEASE HELP ME HURRY!!!

Lelechka [254]

Yes you’re correct it’s A : 11,529

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3 years ago

What are Numbers? Why do we need them?​

What are Numbers? Why do we need them?