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3 years ago

Which shows the best estimate to use to find 43 × 78?

Mathematics

1 answer:

Over [174]3 years ago

4 0

Answer:

The best estimate for 43x78 is 40x80

Step-by-step explanation:

43 rounded to the nearest ten is 40.

78 rounded to the nearest ten is 80.

The answer to 40x80 is 3200

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Which factoring technique could you use to factor the following polynomial:

guapka [62]

The ans shld be b blah blah

3 0

3 years ago

Describe in words the region of R3 reperesented by the equations or inequalities x2+y2+z2≤3

Vaselesa [24]

Answer:

The region represented by the equation is a full sphere of radius √3 centered in the origin of coordinates.

Step-by-step explanation:

In a plane xy, the equation that represents a circle with center in the origin, of radius r is

$x^2+y^2=r^2$

in R³, or a space xyz, we can represent a sphere with its center in the origin, and of radius r, with the equation

$x^2+y^2+z^2=r^2$

So, in this problem we have that

$3=r^2$

which means that the sphere has a radius of √3.

Finally, our equation is an inequality, and the sphere is equal to, and less than, the calculated radius.

Therefore, the sphere is "full" from the surface to its center.

8 0

3 years ago

1 1/2 divided by $0.99?

saw5 [17]

11/2 divided by $0.99 is $1.51

8 0

3 years ago

The answer please I need the answers

enyata [817]

Answer:

I think you need to multiply 12 and 7 and then cut that in half

7 0

3 years ago

Here's the deal. I give you a question, you give me an answer. I give you points and Brainliest if possible. You use the points

olga55 [171]

Answer:

f(x) = -(x-3)^2 + 4

Step-by-step explanation:

(h; k) are the coordinates of the vertex.

On the graph are (3, 4), therefore we have:

f(x) = a(x-3)^2 + 4

We have the x- intercept (1,0) -> x=1; y=0.

Substitute them into the equation:

0 = a(1 - 3)^2 + 4

0 = a(-2)^2 + 4

4a + 4 = 0 | -4

4a = -4 |-4

a = -1

So, we have the answer:

f(x) = -(x-3)^2 + 4

5 0

3 years ago