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3 years ago

Please help! this is a final! FUNCTIONS

Mathematics

1 answer:

Gnom [1K]3 years ago

3 0

The zeroes are -1/2 and -2
last option

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4. Raj and Saleem can type 20 and 40 words,

kondaur [170]

Answer:

Raj will take 10 minutes

explanation:-

Raj types 20 words per minute

Saleem types 40 words per minute

I. e speed and time are inversly proportional.

therefore, Raj will take twice the time Saleem takes.

Raj takes 2 * 5 = 10 minutes

3 0

3 years ago

PLEASE HELP I CANNOT DO THIS!!

Sladkaya [172]

<span>8x4-(2x3+8) divided by 2=25.</span>

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3 years ago

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Anuta_ua [19.1K]

Option A:

$\left(x^{4}\right)\left(3 x^{3}-2\right)\left(4 x^{2}+5 x\right)=12 x^{9} +15 x^{8} - 8 x^{6}-10 x^{5}$

Solution:

Given expression $\left(x^{4}\right)\left(3 x^{3}-2\right)\left(4 x^{2}+5 x\right)$ .

To find the product of the above expression:

$\left(x^{4}\right)\left(3 x^{3}-2\right)\left(4 x^{2}+5 x\right)$

First multiply first two factors with each term.

$=(x^{4} \times 3 x^{3}- x^{4} \times 2 ) \left(4 x^{2}+5 x\right)$

Using exponent rule: $a^m \cdot a^n=a^{m+n}$

$=(3 x^{7}- 2x^{4} ) \left(4 x^{2}+5 x\right)$

Now multiply these two factors with each term.

$=3 x^{7} (4 x^{2}+5 x)- 2x^{4} \left(4 x^{2}+5 x\right)$

$=(4 x^{2} \times 3 x^{7} +5 x \times 3 x^{7} )- \left(4 x^{2} \times 2x^{4}+5 x \times 2x^{4}\right)$

Using exponent rule: $a^m \cdot a^n=a^{m+n}$

$=(12 x^{9} +15 x^{8} )- (8 x^{6}+10 x^{5})$

$=12 x^{9} +15 x^{8} - 8 x^{6}-10 x^{5}$

$\left(x^{4}\right)\left(3 x^{3}-2\right)\left(4 x^{2}+5 x\right)=12 x^{9} +15 x^{8} - 8 x^{6}-10 x^{5}$

Hence option A is the correct answer.

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3 years ago

Helen wants to buy round plates for her mother.the radius of plates is 1 foot. what is the plate's circumference?

Yuki888 [10]

The circumference is 6.28 because if u use the equation C=2piR. C=2pi1. 2(3.14)1. 6.28(1)= 6.28

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3 years ago

(HELP QUICK!! 50PTS & BRAINLIEST!!!) Wilson middle school is selecting students to be the the spring festival show. There ar

Fittoniya [83]

Answer:

The answer option is C 45

Step-by-step explanation:

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3 years ago