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ANTONII [103]
3 years ago
5

Can someone help me with this please?

Mathematics
2 answers:
Harrizon [31]3 years ago
6 0

Answer:

I think it's would be D

Step-by-step explanation:

1/2 is 50% So you add 19 and 50 to get 69% or 69/100

anastassius [24]3 years ago
6 0
The answer to this question would be D
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The circular base of a cone has a radius of 5 centimeters. The height of the cone is 12 centimeters, and the slant height is 13
shepuryov [24]

Answer:

Hence, the surface area of cone is:

282.6 cm^2 which is approx 283 cm^2.

Step-by-step explanation:

We are given:

  • The circular base of a cone has a radius of 5 centimeters.

           i.e. r=5 cm.

  • The height of the cone is 12 centimeters

               i.e. h=12 cm.

  • The slant height is 13 centimeters.

                    i.e. l=13 cm.

Now we know that the surface area(S.A.) of cone is given by:

S.A.=\pi r(l+r)

Hence by putting the value of l,r and π in the formula we get:

S.A.=3.14\times 5\times (13+5)\\\\S.A.=15.7\times 18\\\\S.A.=282.6

Hence the surface area of cone is 282.6 cm^2 which is approx 283 cm^2.

4 0
3 years ago
Read 2 more answers
The weight of 6 eggs is shown. Identify the constant of proportionality of total weight to number of
Georgia [21]

Answer:

  • 41 g per egg

Step-by-step explanation:

<u>Proportional relationship:</u>

  • y = kx

<u>Given:</u>

  • x = 6,
  • y = 246

<u>Find k:</u>

  • 246 = 6k
  • k = 246/6
  • k = 41

5 0
3 years ago
Read 2 more answers
Solve the system of equations:<br> y = 2x - 3<br> y = x2 - 2x - 8
tino4ka555 [31]

Answer:

Step-by-step explanation:

y = 2x - 3   --------------(i)

y = x² - 2x - 8 -----------(ii)

Substitute y = x² - 2x - 8 in equation (i)

x² - 2x - 8 = 2x - 3

x² - 2x - 8 - 2x + 3 = 0

x² - 2x -2x - 8 + 3 = 0

x² - 4x - 5 = 0

x² + 1x - 5x -5 = 0

x(x + 1) - 5(x + 1) = 0

(x + 1)(x - 5) = 0

x + 1 =0 ; x -5 = 0

x = -1     ; x = 5

When x  = -1;    y =2*(-1) - 3 = -2 -3 = -5

When x = 5;     y = 2*5 - 3 = 10-3 = 7

6 0
4 years ago
PLS HELP ILL MARK BRAINLIEST!!!
Novay_Z [31]

Answer:

X is 20 :)

Step-by-step explanation:

this is what you would do

set (2+3x)= 62

3x=62-2

3x=60

60/3=x

x=20!

8 0
3 years ago
Suppose the random variable X has the uniform distirbution on [a,b]. Find expressions involving a and b for the expected valkue,
Margarita [4]

Answer:

Mean = 5

Variance = 8.3521

Standard Deviation = 2.89

Step-by-step explanation:

X has the uniform distribution on [a, b]

[a, b] = [a, 10]

Mean is solved using (a + b)/2

= \frac{a + b}{2}\\= \frac{0 + 10}{2}\\= \frac{10}{2}\\= 5

Standard Deviation = \sqrt{variance}

Standard Deviation =

=\frac{b - a}{\sqrt{12} } \\= \frac{10 - 0}{\sqrt{12} } \\= \frac{10}{\sqrt{12} } \\= \frac{10}{3.464 } \\= 2.886836028\\ = 2.89

Variance = (Standard Deviation)^{2}

Variance = 2.89^{2} = 8.3521

7 0
3 years ago
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