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KengaRu [80]
2 years ago
15

How many solutions does this equation have 8x - 4 = 2(4x - 4)

Mathematics
2 answers:
enot [183]2 years ago
8 0

Answer:

No solution

Step-by-step explanation:

Multiplying out the right side gives us an expression 8x - 8 which is easier to compare the the expression on the left side:

8x - 4 = 8x - 8

Subtracting 8x from both sides yields -4 = -8, which is never true.  Thus, the given equation has no solution.

Naya [18.7K]2 years ago
5 0
The answer is 0.

BRAINLIEST PLEASE
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Evaluate:5^-1 – 6^-1<br> with explanation please!!
Verizon [17]

Answer:

1/30

Step-by-step explanation:

5^-1 = 1/5

6^-1 = 1/6

1/5 - 1/6 = 1/30

5 0
2 years ago
3x+5-x=2x+7 is infinite real soluction, no real soluction or one real soluction
Helga [31]

Answer:

There is no real solution.

Step-by-step explanation:

There is no solution because 5 is not equal to 7.

8 0
3 years ago
Make a list of the 2- digit numbers
MrRissso [65]
12
13
78
97
65
90
70
these are numbers with 2 digits
5 0
3 years ago
Read 2 more answers
(845,230) +-834 -0.4556=
Levart [38]
<span>(845,230) +-834 -0.4556= </span>844395.5444

7 0
3 years ago
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A tunnel is built in form of a parabola. The width at the base of tunnel is 7 m. On
uysha [10]

Given:

The width at the base of parabolic tunnel is 7 m.

The ceiling 3 m from each end of the base there are light fixtures.

The height to light fixtures is 4 m.

To find:

Whether it is possible a trailer truck carrying cars is 4 m wide and 2.8 m high is going to drive through the tunnel.

Solution:

The width at the base of tunnel is 7 m.

Let the graph of the parabola intersect the x-axis at x=0 and x=7. It means x and (x-7) are the factors of the height function.

The function of height is:

h(x)=ax(x-7)             ...(i)

Where, a is a constant.

The ceiling 3 m from each end of the base there are light fixtures and the height to light fixtures is 4 m. It means the graph of height function passes through the point (3,4).

Putting x=3 and h(x)=4 in (i), we get

4=a(3)((3)-7)

4=a(3)(-4)

\dfrac{4}{(3)(-4)}=a

-\dfrac{1}{3}=a

Putting a=-\dfrac{1}{3}, we get

h(x)=-\dfrac{1}{3}x(x-7)              ...(ii)

The center of the parabola is the midpoint of 0 and 7, i.e., 3.

The width of the truck is 4 m. If is passes through the center then the truck must m 2 m on the left side of the center and 2 m on the right side of the center.

2 m on the left side of the center is x=1.5.

A trailer truck carrying cars is 4 m wide and 2.8 m high is going to drive through the tunnel is possible if h(1.5) is greater than 2.8.

Putting x=1.5 in (ii), we get

h(1.5)=-\dfrac{1}{3}(1.5)(1.5-7)

h(1.5)=-(0.5)(-5.5)

h(1.5)=2.75

Since h(1.5)<2.8, therefore the trailer truck carrying cars is 4 m wide and 2.8 m high is going to drive through the tunnel is not possible.

6 0
2 years ago
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