Answer:
(7, -4.5)
Step-by-step explanation:
25−x=−4y ---> x=25+4y
3x−2y=30
use x to substitute into the second equation
3 (25+4y)-2y = 30
75+12y-2y=30
75+10y=30
10y=-45
y=-4.5
3x-2(-4.5)=30
3x+9=30
3x=21
x=7
check:
25-7=-4*-4.5
18=18 (yes)
3*7-2*-4.5=30
21+9=30
30=30 (yes)
Answer:
The geometrical relationships between the straight lines AB and CD is that they have the same slope
Step-by-step explanation:
Given
Required
The relationship between AB, CD
Since AB is a straight line and O is the origin, then:
Where:
====>
====>
This implies that:
So:
So, we have:
Calculate the slope (m) of
For AB
For CD
By comparison:
This implies that both lines have the same slope
We have to round the number 83.5851 to the nearest hundredth.
If the next smallest place is greater than or equal to 5 we increase the value of the digit we are rounding to by one.
83.5851 ≈ 83.59
Answer: 83.59
Based on the amount of your monthly bill, if you lived in England, your bill to the nearest hundredth is $185.82
<h3>How to find your bill in pound sterling?</h3>
You have a monthly bill of $304.72. If this was also your bill in England id you stayed there, it would need to be converted to pounds. The way to do this is by using the exchange rate.
If each British Pound is $1.64 U.S. Dollar, then the value of your monthly bill if you lived in England is:
= Monthly bill in dollars / Conversion or exchange rate
= 304.72 / 1.64
= $185.82
Find out more on the exchange rate at brainly.com/question/20332320
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Answer:
455ways
Step-by-step explanation:
This is expressed as 15 C 3 ( C- combination)
The concept of combination is used when we talk about selection.
Now we are selecting 3 from a sample of 15
15 C 3 = 15! / (15-3)! 3! = 15 ×14×13×12!/12!×3×2
= 5 × 7 × 13 = 455ways