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slava [35]
3 years ago
11

help please! by what fraction would you multiply 8 1/2 so that the proudct is about 5 explain your reasiong

Mathematics
1 answer:
blsea [12.9K]3 years ago
8 0

9514 1404 393

Answer:

  5/8 or 5/9

Step-by-step explanation:

The fraction will be exactly ...

  5/(8 1/2) = 10/17   ⇒   (8 1/2)×(10/17) = 5

__

The fraction will be approximately ...

  5/8 or 5/9

The denominator will be a number that makes (8 1/2)/(denominator) ≈ 1. For that denominator, the numerator will be 5, so that we have ...

  (8 1/2) × (5/denominator) ≈ 5

  (8 1/2)/(denominator) ≈ 1 .  . . . . . . . divide by 5

If we want the denominator to be an integer, we could choose either 8 or 9. If we choose 8, the result will be slightly more than 5; if we choose 9, the result will be slightly less.

  (8 1/2) × (5/8) = 5.3125 ≈ 5

  (8 1/2) × (5/9) = 4.722... ≈ 5

Either 5/8 or 5/9 will give a product of about 5.

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Please help on b (left of c) and c !!!
vesna_86 [32]
Alrighty


remember
(ab)^c=(a^c)(b^c)
and
x^\frac{m}{n}=\sqrt[n]{x^m}
and
(x^m)^n=x^{mn} and [tex]x^0=1 for all real numbers x
and
x^{-m}=\frac{1}{x^m}


b.
(x^5y^4)^\frac{1}{2}=((x^5)^\frac{1}{2})((y^4)^\frac{1}{2})=
(x^\frac{5}{2})(y^\frac{4}{2})=(\sqrt{x^5})(\sqrt{y^4})=x^2y^2\sqrt{x}

c.
x^0=1
so
that (x^-3y)^0=1
because exponents first in pemdas
so we are left with
x^2y^-1
x^2y^{-1}=(x^2)(y^{-1})=(x^2)(\frac{1}{y^1})=\frac{x^2}{y}
3 0
3 years ago
Read 2 more answers
Match the parametric equations with the verbal descriptions of the surfaces by putting the letter of the verbal description to t
alukav5142 [94]

Answer:

1. B

2. C

3. A

4. D

Step-by-step explanation:

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x(u,v)=a\cos v\\y(u,v)=a\sin v\\z(u,v)=u

If the orientation of the cylinder is changed to have the height u along the x-axis, the parametric equations of the cylinder match:

3. \mathbf{r} \left( u, v \right) = u \mathbf{i} + \cos v \mathbf{j} + \sin v \mathbf{k}

The parametric equations of the circular paraboloid are:

x(u,v)=u\cos v\\y(u,v)=u\sin v\\z(u,v)=u^2

Using the units vectors the parametric equations match:

1. \mathbf{r} \left( u, v \right) = u \cos v \mathbf{i} + u \sin v \mathbf{j} + u^{2} \mathbf{k}

The parametric equations of the cone are:

x(u,v)=au\cos v\\y(u,v)=au\sin v\\z(u,v)=u

Using the units vectors  and rotating the base of the cone from z=0 to x=0  the parametric equations match:

2. \mathbf{r} \left( u, v \right) = u \mathbf{i} + u \cos v \mathbf{j} + u \sin v \mathbf{k}

The equation left is the equation of a plane:

4. \mathbf{r} \left( u, v \right) = u \mathbf{i} + v \mathbf{j} + \left( 2u - 3v \right) \mathbf{k}

5 0
3 years ago
If x = -3, calculate the value of: 2x2 + x
user100 [1]
At x=-3:

2x^2+ x
= 2(-3)^2+ (-3)
= 2*9 -3
= 18 -3
= 15

The value of 2x^2+ x is 15 if x=-3~
8 0
4 years ago
Two children want to race around the city block. The length of the block is 80 yards. The width of the block is 60 yards.
Levart [38]
If you would like to know which is the correct unit of measurement to use when figuring out how many yards each child would run in the race, you can calculate this using the following steps:

80 yards * 2 + 60 yards * 2 = 160 + 120 = 280 yards

The correct measurement would be A. yards.
5 0
3 years ago
A square pyramid has a base with sides 36 meters long and with a slant height of 6.5 meters
Anna35 [415]

Answer:

A. (Image attached)

B. 1764 m^2

Step-by-step explanation:

4 0
3 years ago
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