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HACTEHA [7]
3 years ago
13

Which on is not a function

Mathematics
1 answer:
tekilochka [14]3 years ago
4 0

Answer:

D.

Step-by-step explanation:

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Find X : log2+ logx=1
Dominik [7]
log2+logx=1;\ D:x\in\mathbb{R^+}\\\\log(2\ \cdot\ x)=log10\iff2x=10\ \ \ /:2\\\\x=5\in D\\\\Solution:x=5.
8 0
3 years ago
Read 2 more answers
In one area, the lowest angle of elevation of the sun in winter is 27.5°. Find the minimum distance x that a plant needing full
Alex73 [517]

Answer:

The minimum distance x that a plant needing full sun can be placed from a fence that is 5 feet high is 4.435 ft

Step-by-step explanation:

Here we have the lowest angle of elevation of the sun given as 27.5° and the height of the fence is 5 feet.

We will then find the position to place the plant where the suns rays can get to the base of the plant

Note that the fence is in between the sun and the plant, therefore we have

Height of fence = 5 ft.

Angle of location x from the fence = lowest angle of elevation of the sun, θ

This forms a right angled triangle with the fence as the height and the location of the plant as the base

Therefore, the length of the base is given as

Height × cos θ

= 5 ft × cos 27.5° = 4.435 ft

The plant should be placed at a location x = 4.435 ft from the fence.

8 0
3 years ago
A trail around a lake is 4 1/4 miles long. What is the length, in feet, of the trail?
Allisa [31]
1 mile= 5280 feet
1/5280= 4.25/x This is a proportion. 
5280 * 4.25= 22440
22440/1= 22440 

4 1/4 miles= 22440 feet

Hope this helps! :D
7 0
3 years ago
Read 2 more answers
In circle O below, segment RA is a diameter, arc RP = 98 degrees, and arc RQ = 68 degrees. Find the
lys-0071 [83]

Answer:

90°.

Step-by-step explanation:

if AR is diameter and the angle ∠AOR (it's m∠2) is based on this diameter, then its measure is 90°. It is central angle.

4 0
1 year ago
How do you factor this equation?<br> 7x²+5x-3
svetoff [14.1K]

Answer:

Step-by-step explanation:

This is a quadratic expression.  Use the quadratic formula to find the roots, and then once you have the roots, write the corresponding factors.

The coefficients of this quadratic expression are a = 7, b = 5 and c = -3

The discriminant is b^2 - 4ac, or 5^ - 4(7)(-3), or 25 + 84 = 109.  Because this is positive, we know that the expression has two unequal, real roots.

Using the quadratic formula, we now find these roots:

      -b ± √(discriminant)

x = --------------------------------   which here is:

                   2a

      -5 ± √109

x = -----------------

             14

The factors can be found from these two roots.  The first one is

      -5 - √109                  5 + √109

(x - ---------------- )  =  (x + ---------------- )

             14                              14

and the second is

        5 - √109              

(x + ---------------- )  

             14                

8 0
3 years ago
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