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3 years ago

PLEASE HELP! A pair of linear equations is shown:

Mathematics

1 answer:

Brilliant_brown [7]3 years ago

3 0

Answer:

(D) On a graph, plot the line y = −x + 1, which has y-intercept = 1 and slope = −1, and y = 2x + 4, which has y-intercept = 4 and slope = 2, and write the coordinates of the point of intersection of the two lines as the solution.

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The scale of a map is 1 : 25 000

Artyom0805 [142]

Answer: 5.5km

Step-by-step explanation:

The scale given 1 : 25 000 , and it was said that on the map , the distance between two railway stations is 22 cm , this means that the scale of the map is 1: 25000 cm.

The scale 1 : 25 000 means that each centimeters on the map represent 25 ,000 in real life ,therefore , to calculate the real distance between the two railway station , we have

25,000 X 22

= 550000 cm

To convert this to km

Recall that

1 km = 100,000 cm

Therefore we will divide the answer by 100,000 , that is

550000/100000

= 5.5 km

Therefore , the real distance between the two railway stations is 5.5km

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3 years ago

Which equation is the inverse of y = 16x2 + 1?

Llana [10]

Answer:

$y=\frac{\sqrt{x-1} }{4}$

Step-by-step explanation:

The given equation is

$y=16x^2+1$

For this function to have an inverse, we must restrict the domain, say $x\ge0$

We interchange x and y to get,

$x=16y^2+1$

We now make y the subject to get;

$x-1=16y^2$

We divide through by 16 to get;

$\frac{x-1}{16}=y^2$

We now take the square root of both sides to get;

$\pm \sqrt{\frac{x-1}{16}}=y$

$y=\pm \frac{\sqrt{x-1} }{4}$

Since $x\ge 0$ , the inverse function is

$y=\frac{\sqrt{x-1} }{4}$

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3 years ago

Select the items the crusaders brought back with them from the East.

gulaghasi [49]

Answer:Jewels, WOOL, SILK

Step-by-step explanation:

sorry for the caps

4 0

3 years ago

Read 2 more answers

Suppose the scores of students on an exam are normally distributed with a mean of 244 and a standard deviation of 79. According

Ahat [919]

244 - 165 = 79 . . . . one standard deviation
323 - 244 = 79 . . . . one standard deviation

The range of scores is ±1 standard deviation from the mean. The empirical rule says
68% of scores lie in that range.

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3 years ago

A man spends 80% of his salary and saves the rest. He saves $1080 a month. Find his salary

raketka [301]

His salary is $5.400.00

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3 years ago