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1 year ago

3. Determine which of the following variables are qualitative and which are quantitative variables. Explain your

Mathematics

1 answer:

Tanya [424]1 year ago

4 0

Answer:

Quantitative Variables. As discussed in the section on variables in Chapter 1, quantitative variables are variables measured on a numeric scale. Height, weight, response time, subjective rating of pain, temperature, and score on an exam are all examples of quantitative variables

A is correct

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Alexndra earns $125 from her paper route each month but she spends about $20 each month on personal expenses.To pay for a school

Andrei [34K]

It would take Alexandria 8 months to earn the money.

125-20= 105 monthly earnings after personal expenses
800/105= 7.6 which rounds to 8.

8x105= 840

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3 years ago

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Elimination method: ax+by=r, -bx+cy=s

Alex17521 [72]

$\left[\begin{array}{ccc}ax+by=r\\\\-bx+cy=s\end{array}\right]$

Isolate x for $ax+by=r$

$x= \frac{r-by}{a} ; a \neq 0$

Subsititute $x= \frac{r-by}{a}$

$-b \frac{r-by}{a} +cy=s$

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$r=- \frac{as-acy-b^2y}{b} ; a \neq 0;b \neq 0$

For x : $\frac{r-by}{a}$

Subsititute r = $- \frac{as-acy-b^2y}{b}$

$x= -\frac{as-acy-b^2y}{b}/a$

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The solutions to the system of equations are:

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3 years ago

Two sides of an equilateral triangle are labeled 12 inches and 3x - 6 inches. Find x.

astra-53 [7]

Answer:

Step-by-step explanation:

In equilateral triangle, all the sides are congruent.

3x - 6 = 12

Add 6 to both sides

3x = 12 + 6

3x = 18

Divide both sides by 3

x = 18/3

x = 6

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3 years ago

Why would someone choose to use a graphing calculator to solve a system of linear equations instead of graphing by hand? Explain

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It is easier to use a calculator. Plus a lot of us won’t use graphing when we are older

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4 years ago

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5 m/s/s
is the answer to The car started from a standstill and reached a speed of 100m/s during the first 20 seconds of the trip what is the average acceleration of the car over those 20 seconds?

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3 years ago