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xenn [34]
3 years ago
13

One number is twice another. The sum of their reciprocals is 3/2 . Find the numbers.

Mathematics
1 answer:
MissTica3 years ago
7 0

Answer:

The two numbers are 1 and 2.

Step-by-step explanation:

Let the two numbers be <em>a </em>and <em>b</em>.

One number is twice another, so let's let <em>b=2a</em>.

Their reciprocals are 3/2. Thus:

\frac{1}{a}+\frac{1}{b} =\frac{3}{2}

Substitute and solve for <em>a: </em>

<em />\frac{1}{a}+\frac{1}{2a} =\frac{3}{2}\\<em />

Combine the fractions by forming a common denominator by multiplying the left term by 2:

\frac{2}{2a} +\frac{1}{2a}=\frac{3}{2}

Combine and cross-multiply:

3/2a=3/2\\6a=6\\a=1\\b=2(1)=2

Thus, the two numbers are 1 and 2.

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What solid figure can have the same cross section as a sphere? Question 16 options:
dybincka [34]
A cylinder has  a cross section of a circle as well as the sphere.
6 0
3 years ago
The function h(x) = 12x8 + 49 is an even function. Which transformation of h(x) would result in a function that is neither even
Irina-Kira [14]

Answer:  translation 8 units to the right

Step-by-step explanation:

An even function is a function such that:

h(x) = h(-x)

and the function is odd if:

h(-x) = -h(x)

Now, let's talk about transformations:

A) Reflection over the x-axis:

When we have a point (x,y) and we do a reflection over the x-axis, the reflected point will be:

(x, -y).

Then for the case of a function:

y = h(x).

then the reflection will be:

g(x) = - y = -h(x).

And if h(x) is even, -h(x) is also even, so this is not the correct option.

B) Vertical stretch by a factor of 7.

This is written as:

g(x) = 7*h(x).

then:

g(x) = 7*h(x)

g(-x) = 7*h(-x) = 7*h(x) = g(x)

the transformation is even.

C) Translation of 8 units to the right.

We can write this as:

g(x) = h(x - 8).

Then:

g(-x) = h(-x -8) = h(x + 8)

Then g(-x) is not equal to g(x)

and also g(-x) ≠ -g(x)

So in this case the transformation is neither odd or even.

C)  horizontal compression by a factor of One-half.

This transformation is written as:

g(x) = h( (1/2)*x)

And, similar as the case of the vertical compression, in this case the transformation is also even.

3 0
3 years ago
In the first week of​ July, a record 1100 people went to the local swimming pool. In the second​ week, 125 fewer people went to
Vladimir [108]
In July:
First week:
Number of people went to the local swimming pool =1040
Second week:
110 fewer people went to the pool than in the first week
so,
Number of people went to the local swimming pool =1040-110
=930
Third week:
130 more people went to the pool than in the second week
so,
Number of people went to the local swimming pool =930+130
=1060
Fourth week:
228 fewer people went to the pool than in the third week
so,
Number of people went to the local swimming pool =1060-228
=832
Decrease in number of people over four week= number of people in first week - number of people in fourth week
Decrease in number of people over four week=1040-832
=208
now, we can find percentage
Percentage is

=20%.........Answer
6 0
3 years ago
8(8p+8)=640 solve <br> Answer ASAP please
Ede4ka [16]

Answer:

p = 9

Step-by-step explanation:

8(8p + 8) = 640

use the dist property

64p + 64 = 640

<u>         -64      -64</u>

64p = 576

divide by 64

p = 9

6 0
3 years ago
Read 2 more answers
I need both of these help!
marysya [2.9K]
The angle next to the angle 5x is 180 - 5x

All angles sum to 360

(6x - 58) + (2x + 4) + (180 - 5x) = 180
3x + 126 = 180
3x = 54
x = 18

For question 10, sum of angles in pentagon is 540 degrees

x + 105 + 85 + 114 + 126 = 540
x + 430 = 540
x = 110

3 0
3 years ago
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