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4 years ago

Write an expression for the calculation double 2 and then add 5

Mathematics

2 answers:

valina [46]4 years ago

7 0

Answer:

Step-by-step explanation:

ankoles [38]4 years ago

6 0

The expression could be 2(2) + 5, or 2 squared + 5, as well.

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If a=b+3, express a+b in terms of b and evaluate the expression when b=3

Reptile [31]

Step-by-step explanation:

a=b+3

when b=3

a+b= b+3+b= 2b+3 = 6+3=9

5 0

3 years ago

Find the missing dimension of a triangle with a base of 14.2 yd and a area with 63.9 yd

aalyn [17]

Answer:

area : 63.9

b : 14.2

write equation of area of a triangle

Step-by-step explanation:

area:. 1/2 × B x H

solve for H : H= _2x_area_

Substitude values : _H = _2×63.9___

14.2.

Evaluate : H = 9

8 0

3 years ago

A conical paper funnel of radius 4 and height 6 units is needed to make a good cup of coffee. If this funnel is made out of a se

Nimfa-mama [501]

Answer:

The radius of this circle is $2\sqrt{13}$ and the central angle of the sector is $\theta=\frac{2}{\sqrt{13}}\times360^\circ$ .

Step-by-step explanation:

Consider the provided information.

If a conical paper funnel is made out of a sector of circle then the radius of the sector becomes the slant height of the cone, and the length of the curved part of the sector becomes the circumference of the base of the cone.

First find the slant height: $l=\sqrt{r^2+h^2}$

$l=\sqrt{4^2+6^2}$

$l=\sqrt{16+36}$

$l=2\sqrt{13}$

Thus, the radius of the sector is $2\sqrt{13}$ which is same as the slant height of the cone.

Now, the circumference of the base of the cone is same as the length of the curved part.

$C=2\pi r$

$C=2\pi \times4=8\pi$

The length of the curved part = $\frac{\theta}{360\circ}\times2\pi r$

$\frac{\theta}{360\circ}\times2\pi \times2\sqrt{13}=8\pi$

$\frac{\theta}{360\circ}\times\sqrt{13}=2$

$\theta=\frac{2}{\sqrt{13}}\times360^\circ$

Hence, the radius of this circle is $2\sqrt{13}$ and the central angle of the sector is $\theta=\frac{2}{\sqrt{13}}\times360^\circ$ .

4 0

4 years ago

Can anyone help me with these questions please? 5 + 2x = 19 and also 4x + 3 = 27

Elza [17]

Answer:

x= 7

x=6

Step-by-step explanation:

5+2x=19

Subtract 5 from both sides

so...

2x=14

then divide by two to isolate the x

so..

x=7

4x+3=27

Subtract 3 from both sides

so...

4x=24

then divide by 4 to isolate the x

so....

x=6

3 0

3 years ago

Read 2 more answers

Which function is the inverse of y=2/3x-6

Dmitry_Shevchenko [17]

Answer:

y = 3(x + 6)/2

Step-by-step explanation:

I'm assuming that you meant y = (2/3)x - 6.

If that's correct, start by interchanging x and y, obtaining:

x = (2/3)y - 6

Next, solve for y: (2/3)y = x + 6. Multiplying both sides of this equation by (3/2) isolates y, as desired, and results in:

y = 3(x + 6)/2. This is the inverse of y = (2/3)x - 6.

7 0

4 years ago

Read 2 more answers