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3 years ago

Fill in the other coordinate for the line 2x−5y=11 (2, )

2 answers:

8 0

Well what you do is move the 2x over to the other side to make y=mx+b. It should look like this: -5y=-2x+11. Then you replace the x with 2,it should now look like this: -5y=-2(2)+11. Then you simplify and get this: -5y= 7. Then you divide -5 by both sides and get: y= 1.4 or 1 2/5. Hope that helped! If this is wrong to you double check the question you wrote.

Eduardwww [97]3 years ago

8 0

Given the equation 2x - 5y = 11 and x = 2, plug the 2 in for x and solve for y.
2(2) - 5y = 11
4 - 5y = 11
subtract 4 from both sides
-5y = 7
divide both sides by -5
y = -7/5
(2, -1.4)

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What is the value of (16^3/2)^1/2

Alika [10]

Answer: =1024. *The answer must be have positive sign.*

Step-by-step explanation:

This question's it's about the order of operations. p-parenthesis, e-exponents, m-multiply, d-divide, a-add, and s-subtract. It can also go left to right.

do exponents first.

16³/2=4098=2048¹/2

2048¹=2048

2048/2

divide left to right.

2048/2=1024

Hope this helps!

Thanks!

Have a great day!

4 0

3 years ago

Please answer quickly!!!

yKpoI14uk [10]

Answer:

$c=20$

Step-by-step explanation:

The diagonals of a rectangle always bisect each other. Therefore, we can set $QT=ST$ :

$c=4c-60,\\-3c=-60,\\c=\fbox{20}$

3 0

2 years ago

How can you use rates to determine wheather a situation is a proportional relationship

svp [43]

If the rate is a constant, the relationship is proportional. (The rate is the constant of porportionality.)

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For two or more points on the function curve, divide the dependent variable value by the independent one. If you get the same result in every case, the relationship is porportional.

___

Note

For some non-proportional relationships, it is possible to find points on the graph that will pass the above test. If you suspect the relationship is actually not one of proportionality, try more points. Check also to make sure that (0, 0) is on the curve.

7 0

3 years ago

A rectangular floor of area 360 m2 is going to be tiled. Each tile is rectangular, and has an area of 240 cm2. An exact number o

vladimir1956 [14]

Answer:

1500

Step-by-step explanation:

The area of the regtangular floor is 360m². The floor is going to be retired with tiles having area of 240cm² . We need to find the number of times . Therefore ,

$\implies 360m^2 = 360 \times 10^4 \ cm^2$

And , the number of tiles required will be ,

$\implies n =\dfrac{Area \ of \ floor}{Area \ of \ a \ tile }\\\\\implies n =\dfrac{ 360 \times 10^4 \ cm^2}{240 cm^2} \\\\\implies \underline{\underline{ n = 1,500 }}$

Hence the required answer is 1500 .

7 0

2 years ago

Read 2 more answers

Gnesinka [82]

Answer:

A: 779 cm²

B: 1837 cm²

Step-by-step explanation:

For both problems, use the formula for surface area of a cylinder:

SA = 2πr² + 2πrh

2πr² is the two bases.

2πrh is the curved surface.

PROBLEM A

"the cylinder is 60 cm long" is h = 60.

If given diameter, you can find "r" by dividing it by 2. d = 2r

Given d = 4, then r = 2.

SA = 2πr² + 2πrh

SA = 2π2² + 2π2(60)

SA = 8π + 240π Add

SA = 248π Exact answer

SA ≈ 779.114978 Answer on calculator

SA ≈ 779 Rounded answer

Remember to include the units.

The surface area is about 779 cm².

PROBLEM B

"80 cm long" h = 80.

"circumference of 22 cm". C = 22. Remember C = 2πr. Find "r".

C = 2πr

22 = 2πr

11 = πr

r ≈ 11/π

SA = 2πr² + 2πrh

SA = 2π(11/π)² + 22(80) Substitute 2πr with the circumference.

SA ≈ 1837.030992 Answer on calculator

SA ≈ 1837 Rounded answer

Remember to include the units.

The surface area is about 1837 cm².

7 0

3 years ago