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8090 [49]
3 years ago
5

Obtain an estimate for the following computation by rounding the numbers so that the resulting arithmetic can easily be performe

d by hand or in your head. Then, use a calculator to
perform the computation How reasonable is your estimate when compared to the actual answer?
2815-15.458
An estimate of the difference is (Type a whole number
Mathematics
1 answer:
uranmaximum [27]3 years ago
3 0

Answer:

Step-by-step explanation:

2915 can stay as it is; 15.458 should be rounded down to 15.  Then we have

2915-15, or 2900 (which is a very reasonable estimate).

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Write an equivalent expression for this problem 3x(7x2)
Anni [7]

Answer:

3x(14)

Step-by-step explanation:

3x(7x2)

=3(14)

5 0
4 years ago
What are the odds that the spinner lands on red or the number 4?<br> 4<br> 4<br> 2<br> 33
uranmaximum [27]

Answer:

5 to 3

Step-by-step explanation:

The desired outcomes are 4 or red.

Here are all the possible outcomes:

1 red

1 red

1 red

2 green

3 blue

3 blue

4 yellow

4 yellow

The desired outcomes are in boldface. There are 5 desired outcomes.

There are 3 outcomes that are not desired.

odds of 4 or red = 5 to 3

4 0
3 years ago
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What is 8 3/4 as a decimal? Please I need some help real quick !!!
Rus_ich [418]

Answer:

8.75

Step-by-step explanation:

6 0
3 years ago
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Find an equation in standard form for the hyperbola with vertices at (0,plus or minus 6) and asymptotes at y= (plus or minus 3/5
antoniya [11.8K]

Answer:

\frac{(y)^2}{36}-\frac{(x)^2}{100}=1

Step-by-step explanation:

Given:

Vertices of Hyperbola : (0 ± 6) or (0,6) and (0,-6)

and asymptotes at y= (±3/5)x 0r y= 3/5 x and y=-3/5 x

The vertices are of vertical hyperbola. The equation used will be:

\frac{(y-k)^2}{a^2}-\frac{(x-h)^2}{b^2}=1\\

The Center of hyperbola (h,k) =(0,0)

The Distance from vertices to center is a and a = 6 (given)

For equation we have value of h,k and a and need to find value of b

we know,

y= k ± a/b (x-h)

Values of h and k are zero

y= 0 ± a/b (x-0)

y= (± a/b ) x

We are given asymtotes at y= (± 3/5)x which is equal to y= (± a/b ) x

as a = 6 then b= 10 i.e The simplified form of 6/10 is 3/5 so value of b=10

Putting values of a,b,h and k in equation we get,

\frac{(y-0)^2}{(6)^2}-\frac{(x-0)^2}{(10)^2}=1\\\\\frac{(y)^2}{36}-\frac{(x)^2}{100}=1

7 0
4 years ago
Find the sale price to the nearest cent.<br><br> $140 coat; 10% discount
mrs_skeptik [129]

Answer:

126

Step-by-step explanation:

140*10%

change to decimal:

140*.10

14 dollars off original price

140 - 14 = 126

5 0
3 years ago
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