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prisoha [69]
3 years ago
11

By elimination method solve: 217x+131y=913 and 131x+217y=827

Mathematics
1 answer:
malfutka [58]3 years ago
3 0
◆ Linear equations in two Variables ◆

Hey !!

Check the attachment.
Hope it helps you :)

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What is the measure of m<1 will ensure that the rail is parallel to the bottom of the staircase?
cricket20 [7]

You can observe that angle 1 and angle with 47° are inside a parallelogram.

Consider that the sum of the internal angles of a parallelogram is 360°.

Moreover, consider that the angle at the top right of the parallogram is congruent with the angle of 47°, then, such an angle is if 47°.

Consider that angle down right side is congruent with angle 1, then, they have the same measure.

You can write the previous situation in the following equation:

47 + 47 + ∠1 + ∠1 = 360 simplify like terms

94 + 2∠1 = 360 subtract both sides by 94

2∠1 = 360 - 94

2∠1 = 266 divide by 2 both sides

∠1 = 266/2

∠1 = 133

Hence, the measure of angle 1 is m∠1 = 133°

6 0
1 year ago
What is the discriminant of 9x2 + 2 = 10x?<br> –356 <br> –172 <br> 28<br> 72
Airida [17]

Answer:

<h2><em>C. 28</em></h2>

Step-by-step explanation:

7 0
3 years ago
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The width of a rectangle is three times its height. If it has an area of 60.75 square feet, what are its dimensions?
horrorfan [7]
The answer is D my dude don’t over think. Since it’s are multiply your answer choices till you reach 60.75
8 0
3 years ago
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Let t[1..n] be a sorted array of distinct integers, some of which may be negative. give an algorithm that can find an index i su
lisabon 2012 [21]
Assuming we need to find i such that 
1 &le; i &le; n  and t[i]=i.

If we need to find only the first occurrence, we can do:

for i:1 to n {
    if t[i]=i then return(i)
}

If exhaustive search is required, then put the results (values of i) in an array or a linked list, return the number of values found, and the array (or linked list).


8 0
3 years ago
Write a two-columm proof
Nastasia [14]

Both angles 2x+6 and 96 shown are vertically opposite angles and vertically opposite angles are always equal

so 2x+6 should be equal to 96

so 2x + 6 = 96

Now we have to solve for x here and have to get x by itself on left hand side

So first get rid of +6 by doing its opposite -6 on both sides

2x + 6 -6 = 96 -6

2x = 90

Now to get x by itself we have to get rid of 2, for that divide both sides by 2

\frac{2x}{2} = \frac{90}{2}

x = 45

Hence proved that x = 45

4 0
3 years ago
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