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liraira [26]
2 years ago
13

If A = 3x² + 5x - 6 and B=-2/- 6x + 7, then

Mathematics
1 answer:
sesenic [268]2 years ago
3 0

Answer:

{5x }^{2}  + 11x - 13

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The Volume of a sphare is 28/3 times the surface area calculate The surface area and the Volume of the sphere, correct to the ne
Aloiza [94]

Given:

Volume of a sphere is \dfrac{28}{3} times the surface area.

To find:

The surface area and the volume of the sphere.

Solution:

Volume of a sphere:

V=\dfrac{4}{3}\pi r^3              ...(i)

Surface area of a sphere:

A=4\pi r^2                      ...(ii)

Where, r is the radius of the sphere.

Volume of a sphere is \dfrac{28}{3} times the surface area.

V=\dfrac{28}{3}\times A

\dfrac{4}{3}\pi r^3=\dfrac{28}{3}\times 4\pi r^2

Multiply both sides by 3.

4\pi r^3=112\pi r^2

\dfrac{\pi r^3}{\pi r^2}=\dfrac{112}{4}

r=28

Using (i), the volume of the sphere is:

V=\dfrac{4}{3}\times \dfrac{22}{7}\times (28)^3

V\approx 91989

Using (ii), the surface area of the sphere is:

A=4\times \dfrac{22}{7}\times (28)^2

A=9856

Therefore, the surface area of the sphere is 9856 sq. units and the volume of the sphere is 91989 cubic units.

3 0
3 years ago
The formula for the equation describing a straight line is y = b0 + b1x. the value for b1 in this equation represents the ______
Rasek [7]
Equation of a straight line is normally in the form: y = mx + c.

Where, m and c are constants in which;
m = gradient
c = y-intercept.

Comparing this standard way way of writing the equation of a straight line with the current scenario, this equation can be rewritten as;
y = b1x + b0.

This way, b1 = gradient of the line while b0 = y-intercept.
4 0
3 years ago
5)
masya89 [10]

Answer:

9.95

Step-by-step explanation:

you add 4 miles + 5.2 miles which is 9.2 miles then u add the 3/4 mile which is .75 in a decimal form which equals 9.95

7 0
2 years ago
Choose the best graph that represents the linear equation:<br> X = -3
Zepler [3.9K]
This is how the graph should look like

4 0
3 years ago
Find the interest on a loan of $9,000 for five months with a rate of 11%
Margaret [11]

Answer:

Step-by-step explanation:

total interest payed - $249.00

total payment - $9,249.00

5 0
3 years ago
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