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3 years ago

What is the value of the expression below when a = 3 and b = 7?

Mathematics

2 answers:

Alexandra [31]3 years ago

8 0

The answer is 42 I think

svp [43]3 years ago

6 0

Answer:

Step-by-step explanation:

9^2*7-2*7

56-14

I hope this helps.

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Find the height of a right circular cone if the slant height is 4 units and the radius is 2 units

k0ka [10]

The slant height of the right circular cone will be $l=2\sqrt5}$

<h3>What is slant height of cone? </h3>

The formula for the slant height of the cone is given as:

$l^2=r^2+h^2$

Here we have

r=2 units

h=4 units

By putting the values we will get

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

$l=\sqrt{16+4$

$l=\sqrt{20}$

$l=2\sqrt{5}$

Hence the slant height of the right circular cone will be $l=2\sqrt5}$

To know more about Slant height follow

brainly.com/question/6613758

#SPJ1

7 0

2 years ago

Find the equation of the sphere passing through pleft parenthesis negative 4 comma 7 comma 6 right parenthesis(−4, 7, 6) and qle

Oksi-84 [34.3K]

The equation of a sphere is:

(x – h)^2 + (y – k)^2 + (z – l)^2 = r^2

where h, k and l are the coordinates of the center of the sphere

Using the midpoint formula, the coordinate of the center is:

h = (-4 + 6) / 2 = 1

k = (7 + -5) / 2 = 1

l = (6 + 7) / 2 = 6.5

so the equation becomes:

(x – 1)^2 + (y – 1)^2 + (z - 6.5)^2 = r^2

we plug in any point, in this case point P to solve for r:

(-4 -1)^2 + (7 – 1)^2 + (6 - 6.5)^2 = r^2

r^2 = 61.25

So the full equation is:

8 0

3 years ago

The highest point in the United States is Mount McKinley in Alaska. Its summit is 20,335 feet above sea level. Badwater, a basin

miss Akunina [59]

Answer:

20,053

Step-by-step explanation:

20,335 - 282 = 20,053

5 0

3 years ago

Read 2 more answers

Caroline earns $54 babysitting for 6 hours

Lady_Fox [76]

It would be $9 per hour all you have to do is divide 54 by 6 you get 9, unit rate is 1

I hope this helps

6 0

3 years ago

Simple math but I can't seem to understand it: x+y=2 becomes y=2-x, in order to find slope and y intercept y=mx+b The result bec

IgorLugansk [536]

Answer:

See below.

Step-by-step explanation:

So we started off with the equation:

$x+y=2$

And we subtracted x from both sides to acquire:

$y=2-x$

Now, this is essentially slope-intercept form. Recall that the slope-intercept form is:

$y=mx+b$

Where m is the slope and b is the y-intercept.

If we rearrange our equation:

$y=2-x\\y=-x+2$

And put some parentheses:

$y=(-1)x+(2)$

We can see that this is indeed slope-intercept form.

And we can see that m is -1 and b is 2.

In other words, the slope is -1 and the y-intercept is 2.

3 0

3 years ago

Read 2 more answers