All categories

3 years ago

I b) 3x + 2y = 12 x - y = -1

Mathematics

2 answers:

aivan3 [116]3 years ago

7 0

Answer:

3x+2y=12

x-y= -1 ( this shows that y is greater than x as during subtraction, the answer takes up the integer of the biggest number in the expression)

since, we know that x is greater than y, lets check if the numbers, x being small and y being big gives , 3x+2y=12.

start from 1 and 2, 2 and 3, 3 and 4, 4 and 5, 5 and 6, 6 and 7, 7 and 8, 8 and 9, 9 and 10, 10 and 11, finally 11 and 12.

1) 3+4=7 not equal to 12

2) 3*2+2*3=6+6=12

3)9+8= 17 not equal to 12

4)12+10=22 not equal to 12

5) 15+12= 27 not equal to 12

6) 18+14=32 not equal to 12

7) 21+16= 37 not equal to 12

8) 24+18= 42 not equal to 12

9) 27+ 20=47 not equal to 12

10)30+22=52 not equal to 12

11) 33+24=57

here, only 2 and 3 can replace x and y, so we get that 3*2+2*3=12

prohojiy [21]3 years ago

5 0

Answer:

x intercept: let y = 0 to get x = 4

y intercept: let x = 0 to get y = -6

Step-by-step explanation:

Hope thois helped you!

You might be interested in

A circular plate has circumference 21.4 inches. What is the area of this plate? Use 3.14 for pi.

Brut [27]

Answer:

The area of this plate is $36.31\ \text{inches}^2$ .

Step-by-step explanation:

We have,

Circumference of a circular plate, C = 21.4 inches

The circumference of a circular shape is given by :

$C=2\pi r$

r is radius of circular shape

$r=\dfrac{C}{2\pi}\\\\r=\dfrac{21.4}{2\times 3.14}\\\\r=3.4\ \text{inches}$

Area of this plate is given by :

$A=\pi r^2\\\\A=\pi (3.4)^2\\\\A=36.31\ \text{inches}^2$

So, the area of this plate is $36.31\ \text{inches}^2$ .

8 0

3 years ago

What is f(-2)? -3 -1 1 3

Dima020 [189]

Answer:

Step-by-step explanation:

ccccdcdc

7 0

3 years ago

Read 2 more answers

If outliers are discarded, then the retirement savings by residents of Econistan is normally distributed with a mean of $100,000

zavuch27 [327]

Answer:

$P(X>117000)=P(\frac{X-\mu}{\sigma}>\frac{117000-\mu}{\sigma})=P(Z>\frac{117000-100000}{20000})=P(z>0.85)$

And we can find this probability using the complement rule and the normal standard table or excel:

$P(z>0.85)=1-P(z$

The firgure attached illustrate the problem

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the retirement savings of a population, and for this case we know the distribution for X is given by:

$X \sim N(100000,20000)$