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gogolik [260]
3 years ago
15

What is the value for x 2x+3=x-4

Mathematics
2 answers:
ELEN [110]3 years ago
4 0

Answer:

x = -7

Step-by-step explanation:

2x + 3 = x - 4

→ Minus x from both sides to isolate -4

x + 3 = -4

→ Minus 3 from both sides to isolate x and henceforth find the value of x

x = -7

rusak2 [61]3 years ago
3 0
X= -7
if you plug in -7 for both sides, you get -11= -11
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The endpoints of a diameter of a circle are A(2,1) and B(5,5). Find the area of the circle in terms of pi.
Tcecarenko [31]

Answer:

The area of the circle is A=6.25\pi\ units^{2}

Step-by-step explanation:

step 1

Find the diameter of circle

we know that

The diameter of the circle is equal to the distance AB

the formula to calculate the distance between two points is equal to

d=\sqrt{(y2-y1)^{2}+(x2-x1)^{2}}

substitute the values

AB=\sqrt{(5-1)^{2}+(5-2)^{2}}

AB=\sqrt{(4)^{2}+(3)^{2}}

AB=\sqrt{25}

AB=5\ units

therefore

the diameter of the circle is

D=5\ units  

step 2

Find the area of the circle

The area of the circle is equal to

A=\pi r^{2}

r=5/2=2.5\ units  ----> the radius is half the diameter

substitute

A=\pi (2.5)^{2}

A=6.25\pi\ units^{2}

4 0
3 years ago
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5 0
3 years ago
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Help with trig homework
velikii [3]

Answer:

x =19.2

y=29.8

Step-by-step explanation:

We will use the law of sines to solve this problem

sinA           sin B

----------- = -------------

a                     b

sin 55        sin 40

--------- = ---------------

24.5            x

Using cross products

x sin 55 = 24.5 sin 40

Divide by sin 55

x = 24.5 sin 40 / sin 55

x =19.22512011

To one decimal place

x =19.2

To find the angle opposite y, we know the three angles of a triangle add to 180

y = (180-40-55) = 85

sin 55        sin 85

--------- = ---------------

24.5            y

Using cross products

y sin 55 = 24.5 sin 85

Divide by sin 55

y = 24.5 sin 85 / sin 55

y =29.79516474

To one decimal place

y=29.8


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4 years ago
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saw5 [17]

Answer:

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Step-by-step explanation:

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4 0
3 years ago
If ms.li has 8/11 shirts that are white. 16 are white. how many shirts does she have in all
faust18 [17]

Answer:

22 shirts

Step-by-step explanation:

To find out how many shirts Ms. Li has in total, we have to set up a proportion.

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As you can see, we multiply eight by two to get to sixteen. Whatever we do on the numerators, we must do to the denominators. Thus, eleven multiplied by two is twenty-two t-shirts.

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3 years ago
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