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Brilliant_brown [7]
3 years ago
15

Eighteen and nine tenths is 2.6 less than a number. find the number.

Mathematics
1 answer:
arlik [135]3 years ago
5 0
18(9/10) + 2.6 = 18.8
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The sum of the measures of two angles is 107.3º. One angle has a measure of 51º. What is the measure of the second angle?
babunello [35]

Answer:

56.3°

Step-by-step explanation:

If the total is 107.3° just subtract 51° to get 56.3°

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Which of the following formulas would find the surface area of a right cylinder
Sliva [168]

Answer:

A and B

Step-by-step explanation:

Because the surface area is \pi r^2*2\pi rh

BA is the base, so BA + 2\pi rh also works.

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there are 341 pine trees and spruce trees in woodlot. 122 trees were pine. what fraction of the trees were spruce?​
Olenka [21]

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219 over 1000

Step-by-step explanation:

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2 years ago
a rectangular floor is 12 feet wide and 18 feet long. How much will it cost to carpet the floor if the carpet cost $1.39 per squ
ruslelena [56]
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7 0
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Read 2 more answers
Determine whether the system of linear equations has one and only one solution, infinitely many solutions, or no solution. 2x-y=
Bond [772]

Answer:

The system of linear equations has infinitely many solutions

Step-by-step explanation:

Let's modified the equations and find the answer.

Using the first equation:

2x-y=5 we can multiply by 2 in both sides, obtaining:

2*(2x-y)=2*5 which can by simplified as:

4x-2y=10 which is equal to:

4x=2y+10

Considering the second equation:

=4x+ky=2

Taking into account that from the first equation we know that: 4x=2y+10, we can express the second equation as:

2y+10+ky=2, which can be simplified as:

(2+k)y=2-10

(2+k)y=-8

y=-8/(2+k)

Because (-8) is being divided by (2+k), then (2+k) can't be equal to 0, so:

2+k=0 if k=-2

This means that k can be any number different than -2, and for each of these solutions, there is a different solution for y, allowing also, different solutions for x.

For example, if k=0 then

y=-8/(2+0) which give us y=-4, and, because:

4x=2y+10 if y=-4 then x=(-8+10)/4=0.5

Now let's try with k=-1, then:

y=-8/(2-1) which give us y=-8, and, because:

4x=2y+10 if y=-8 then x=(-16+10)/4=-1.5.

Then, the system of linear equations has infinitely many solutions

8 0
3 years ago
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