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2 years ago

What is the rate of change for the equation y = 2x + 80?

Mathematics

2 answers:

Annette [7]2 years ago

7 0

Answer:

Step-by-step explanation:

The rate of change for a line is the slope.

y = mx + b, where m is the slope.

y = 2x + 80

Hope this helps!

mash [69]2 years ago

4 0

The rate of change is the slope

The linear equation is in the form 'y = mx +b' where m is the slope.

Thus the rate of change is 2.

Hope that helps!

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As a prize for winning a contest, the contestant is blindfolded and allowed to draw 3 dollar bills one at a time out of an urn.

SVEN [57.7K]

Answer:

The probability that none of the $100 bills are selected is 79.6%.

Step-by-step explanation:

The urn contains forty $1 bills and ten $100 bills. This gives a total of 50 bills in the urn.

To draw 3 dollar bills one at a time out of an urn, the probability of not selecting a $100 bill, decreases with each selection.

And the probability of not selecting a $100 bill is the probability of selecting a $1 bill in the first selection = 80% (40/50 x 100).

The probability of selecting a $1 bill the second time = 79.6% (39/49).

The probability of selecting a $1 bill the third time = 79.2% (38/48).

The sum of the probabilities divided by 3 = 79.6% (238.8/3)

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3 years ago

The price of a sweater increased from $15 to $21. What is the percent of change

JulijaS [17]

Making some calculation the change si 25.57%

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3 years ago

Solve the system of linear equations by graphing. y−2x = 5 6x−3y = −15

kykrilka [37]

Yes c_€\€]]^ Times the longest string

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3 years ago

The product of two irrational numbers is (sometime, always, never) rational.

Mrac [35]

sometimes

Step-by-step explanation:

irrational numbers are numbers that cannot be expressed as a quotient of 2 numbers

rational numbers are numbers that can be expressed as a fraction.

for example let's take these examples of iirational numbers:

$\sqrt{2} \times \sqrt{2} = 2$

$\pi \times \pi = 9.86960....$

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2 years ago

Which of the following is a true polynomial identity?

velikii [3]

Answer:

see below

Step-by-step explanation:

When in doubt, you can always multiply them out to see .

The expression a^6 + b^6 can be treated as the sum of cubes, which factors as ...

p^3 + q^3 = (p +q)(p^2 -pq +q^2)

In this case, you have p=a^2 and q=b^2, so the factorization is ...

a^6 +b^6 = (a^2 +b^2)((a^2)^2 -(a^2)(b^2) +(b^2)^2)

a^6 +b^6 = (a^2 +b^2)(a^4 -a^2b^2 +b^4) . . . . . . matches choice D

The expression a^6 -b^6 can be treated either as the difference of cubes, or as the difference of squares. In the former case, its factorization would be ...

a^6 -b^6 = (a^2 -b^2)(a^4 +a^2b^2 +b^4) . . . . . . matches no offering

In the latter case, its factorization could be any of ...

a^6 -b^6 = (a^3 -b^3)(a^3 +b^3)

a^6 -b^6 = (a^3 -b^3)(a +b)(a^2 -ab +b^2) . . . . . . . . . . . matches no offering

a^6 -b^6 = (a -b)(a^2 +ab +b^2)(a +b)(a^2 -ab +b^2) . . . matches no offering

a^6 -b^6 = (a^2 -b^2)(a^2 +ab +b^2)(a^2 -ab +b^2) . . . matches no offering

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3 years ago