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3 years ago

What is the value of x in the equation 8+4 = 2(x-1)? a. 5 b. 11/2 c. 13/2 d. 7

Mathematics

1 answer:

sergiy2304 [10]3 years ago

3 0

Answer:7

Step-by-step explanation:

8+4=12

2(x-1)= 2x-2

12=2x-2

now add 2 to both sides

14=2x

And divide both sides by 2

7=x

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Can someone answer my question please

natta225 [31]

Answer:

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Step-by-step explanation:

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2 years ago

The first step in calculating the mean is to ____the numbers add group

Blababa [14]

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3 years ago

Read 2 more answers

write the equation in standard form for the hyperbola with vertices ( – 12,0) and (12,0), and foci ( – 13,0) and (13,0).

Mashcka [7]

Standard form for the hyperbola with vertices ( – 12,0) and (12,0), and foci ( – 13,0) and (13,0) is $\frac{x^{2} }{144}-\frac{y^{2} }{25}=1$

Hyperbola is a plane curve generated by a point so moving that the difference of the distances from two fixed points is a constant.

Given,

The Vertices of the hyperbola = (-12,0) and (12,0)

Foci = (-13,0) and (13,0)

a=12

ac=13

c= $\frac{13}{12}$

We know,

c= $\sqrt{1+\frac{b^{2} }{a^{2} } }$

$c^{2}=1+\frac{b^{2} }{a^{2} } \\(\frac{13}{12} )^{2}=1+\frac{b^{2} }{144} \\\frac{169}{144}=1+ \frac{b^{2} }{144} \\\frac{b^{2} }{144} =\frac{25}{144}\\ b^{2}=25$

The equation of the hyperbola is

$\frac{x^{2} }{a^{2} }-\frac{y^{2} }{b^{2} }=1\\ \frac{x^{2} }{144 }-\frac{y^{2} }{25 }=1$

Hence, the standard form for the hyperbola with vertices ( – 12,0) and (12,0), and foci ( – 13,0) and (13,0) is $\frac{x^{2} }{144}-\frac{y^{2} }{25}=1$

Learn more about hyperbola here

brainly.com/question/7098764

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1 year ago

a 15 foot building casts a 9 foot shadow. How tall is the building that casts a 30 ft shadow at the same time

Lapatulllka [165]

9 + 9 = 18 + 9 = 27. 1/3 of 9 is 3 27 + 3 = 30
15 x 3 = 45. 1/3 of 15 is 5. So, 45 + 5 = 50.
The building is 50 feet tall.
Hoped this helped! :)

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2 years ago

On a scale of the Uniondale map, 1 inch represents 6 1/2 blocks. If the distance between Keyfood and walnut street school is 3.5

Ivahew [28]

Answer:

22.75

Step-by-step explanation:

3 * 6.5 = 19.5

6.5 / 2 = 3.25

19.5 + 3.25 = 22.75

Plz mark as brainliest if correct! Have a nice day!!!

-Lil G

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2 years ago