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4 years ago

I need help fast (26 POINTS!!)

Mathematics

1 answer:

Vilka [71]4 years ago

5 0

First you multiply 4 by 5
4x5=20

Then you subtract 3 since he ate 3
20-3=17

And that’s your answer

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Find the values of x in the diagram below

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Where the hell is diagram?

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3 years ago

Find the indicated limit, if it exists.

Inessa05 [86]

No solution because it makes the most sense

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A number written in the form of p by Q is called

Vsevolod [243]

Answer:

Rational number

Step-by-step explanation:

If a number is expressed in the form of p/q then it is a rational number. Here p and q are integers, and q is not equal to 0. A rational number should have a numerator and denominator.

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3 years ago

The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass

Tju [1.3M]

Answer:

6.56 g

Step-by-step explanation:

We can write the mass of radioactive isotope left after a time t by using the equation

$N(t)=N_0 (\frac{1}{2})^{\frac{t}{t_{1/2}}}$

where

$N_0 = 210 g$ is the initial amount of radioactive isotope

$t_{1/2}$ is the half-life

$t$ is the time

In this problem, we want to know the amount of radioactive isotope left after 5 half-lives, so after

$t=5 t_{1/2}$

Substituting into the equation, we have

$N(t)=(210 g) (\frac{1}{2})^{\frac{5 t_{1/2}}{t_{1/2}}}=\frac{210 g}{2^5}=6.56 g$

5 0

3 years ago

PLEASSE HELP THANK YOU!!!

Inga [223]

Answer:

$-3x^4+3x^3+8x^2-2x-5$

Step-by-step explanation:

Here we need to move the negative sign to the rest of the variables, and then only add the ones with the same power:

$(-2x^4-2x^3+8x^2+2)-(x^4-5x^3+2x+7)\\-2x^4-2x^3+8x^2+2 - x^4+5x^3-2x-7$

And then move the variables with the same power closer together

$-2x^4-x^4-2x^3+5x^3+8x^2-2x+2-7$

See how -x^4 and -2x^4 are together?

All we have to do now is combine.

$-2x^4-x^4-2x^3+5x^3+8x^2-2x+2-7\\-3x^4+3x^3+8x^2-2x-5$

So our answer is $-3x^4+3x^3+8x^2-2x-5$

3 0

3 years ago

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