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Makovka662 [10]

2 years ago

6

Which of the following represents the polynomial 5x + 3x^4 + 15 − 7x^3 in standard form, the degree of the polynomial, and the n

umber of terms?

1 answer:

professor190 [17]2 years ago

8 0

5x+3x^4+15-7x^3
In standard form:3x^4-7x^3+5x+15
Degree:quartic i believe
# of terms:polynimial or 4 terms

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What is the reciprocal of a negetive number?

lana [24]

Answer:

The reciprocals of a number is sometimes called the Multiplicative Inverse of the number. The product of a negative number and its reciprocal equals 1. If the number is negative then the reciprocal must also be negative to produce a product of +1. The reciprocal of -4 is -1/4.

Step-by-step explanation:

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3 years ago

A man can drive a motorboat 70 miles down the Colorado River in the same amount of time that he can drive 40 miles upstream. Fin

pochemuha

The speed of the current is 40.34 mph approximately.

<u>SOLUTION: </u>

Given, a man can drive a motorboat 70 miles down the Colorado River in the same amount of time that he can drive 40 miles upstream.

We have to find the speed of the current if the speed of the boat is 11 mph in still water. Now, let the speed of river be a mph. Then, speed of boat in upstream will be a-11 mph and speed in downstream will be a+11 mph.

And, we know that, $\text{ distance } =\text{ speed }\times \text{ time }$

$\begin{array}{l}{\text { So, for upstream } \rightarrow 40=(a-11) \times \text { time taken } \rightarrow \text { time taken }=\frac{40}{a-11}} \\\\ {\text { And for downstream } \rightarrow 70=(a+11) \times \text { time taken } \rightarrow \text { time taken }=\frac{70}{a+11}}\end{array}$

We are given that, time taken for both are same. So $\frac{40}{a-11}=\frac{70}{a+11}$

$\begin{array}{l}{\rightarrow 40(a+11)=70(a-11)} \\\\ {\rightarrow 40 a+440=70 a-770} \\\\ {\rightarrow 70 a-40 a=770+440} \\\\ {\rightarrow 30 a=1210} \\\\ {\rightarrow a=40.33}\end{array}$

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2 years ago

When all the variables cancel out in an equation, how do you know if there are no solutions or infinite solutions?

Ivahew [28]

If a number equals the same number, there are infinite solutions
Example: 5=5, which is true, so there are infinite solutions
If a number equals a different number, there are no solutions
Example: 5=2, which isn’t true

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Chen completed the division problem below.

jolli1 [7]

Answer:

WHAT? ok ok so

Step-by-step explanation:

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Simplify 4 over 7 divided by 3 over negative 8

Stolb23 [73]

-1 5/11

Step-by-step explanation:

Dividing fractions is easy as pie, flip the second one over then multiply

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2 years ago