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3 years ago

What do the following equations represent -4x-4y=-5 and x-2y=1

Mathematics

1 answer:

Semmy [17]3 years ago

5 0

Answer:

The answer to your question is: D = non of the above

Step-by-step explanation:

Data

-4x - 4y = -5 (I)

x - 2y = 1 (II)

Process

Find the slopes of both lines

(I) -4x - 4y = -5

-4y = 4x + 5

y = 4/-4 x + 5/-4

y = - x + 5/4

(II) x - 2y = 1

- 2y = - x + 1

y = -1/-2 x + 1/-2

y = 1/2 x - 1/2

The slopes are different slope 1 = -1 and slope 2 = 1/2, so there is no relation between the lines.

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The sum of two numbers is 72. One number is 8

Tpy6a [65]

Answer:

32 and 40

Step-by-step explanation:

Let's call the smaller number x. If the smaller number is x, the equation for this problem is 2x + 8 = 72

Equation:

2x + 8 = 72

2x = 64

x = 32

So now we know the smaller number is 32, so now add 8 and we get 40.

Therefore the 2 numbers are 32 and 40

7 0

3 years ago

Kaitlin drove 936 miles in 13 hours.

sergij07 [2.7K]

Answer:

756 miles

Step-by-step explanation:

Divide 936 by 13 to get 72, the miles per hour and then multiply by 8

5 0

3 years ago

Kelly went bowling five times during the summer. Her scores were 130, 160, 120, 213, and 220. If she wanted to misrepresent the

Masja [62]

Of course it is c. range would show the difference between the highest and lowest scores, there is no mode in her data set, and the median is the middle point of the data set

3 0

2 years ago

Browning, montana, holds the u.S record for the greatest temperature drop in one day. On january 23, 1916, the temperature chang

dmitriy555 [2]

Answer:

Total temperature change 104.25 f.

Step-by-step explanation:

Average temperature change is calculated by dividing total temperature change by the total hours it took for the change.

We have been given the average temperature change.

We have to multiply average temperature change by the total number of hours it took for the temperature to change we get the total temperature change.

⇒ Total temperature change = Average temperature change * total hours

= $-4.17*25$

=104.25 f

4 0

3 years ago

Find the interior angle sum of this polygon.<br><br> Can someone help????

Savatey [412]

<h3>Answer: 1440 degrees</h3>

===================================================

Explanation:

See the diagram below. It shows there are 10 sides, so n = 10.

We'll plug this value of n into the formula below to find the sum of all ten interior angles

S = sum of interior angles

S = 180(n-2)

S = 180(10-2)

S = 180(8)

S = 1440 degrees

---------------

A different approach:

Let's assume this polygon is a regular polygon. This means each angle is congruent to one another.

We have n = 10 sides, so each exterior angle is E = 360/n = 360/10 = 36 degrees.

Each interior angle adjacent to this 36 degree exterior angle is

180-E = 180-36 = 144 degrees

Since we have 10 equal angles of 144 degrees each, so overall the interior angles add to 10*144 = 1440 degrees

Side note: if this polygon is not a regular polygon, then this section does not apply. You would use the first method instead.

6 0

2 years ago