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Ann [662]
3 years ago
9

Someone help me pleaseeeee​

Mathematics
1 answer:
Dafna11 [192]3 years ago
5 0

In an isosceles triangle, there are two sides that are congruent.

In this case, AB and BC are congruent.

Knowing this, we know that AB = BC

Since we know the values of AB and BC, we can put them into the equation:

3x - 4 = 5x - 10

Subtract 3x from both sides:

-4 = 2x - 10

Add 10 to both sides to isolate 'x':

6 = 2x

Divide both sides by 2:

x = 3

Now that we know the value of the variable, we just have to input it into AB's equation:

3x - 4 = 3(3) - 4

3(3) - 4 = 9 - 4

9 - 4 = 5

<u>AB = 5</u>

Good luck!

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Hey surveyor is measuring the distance across a small lake. He has set up his transit on one side of the lake 150 feet from a Pi
AleksAgata [21]

Answer: 87 feet

Step-by-step explanation:

The angle between the pilling is 60°

The adjacent side of the right angle is 150

So let the distance between the pilling be y, that is opposite side.

Opposite / adjacent = tan (60°)

y / 150 = tan (60)

y × tan (60°) = 150

Divide both side by tan (60°)

y = 150 / tan (60°)

y = 150 / 1.7321

y = 87 feet

4 0
3 years ago
A brick of mass 4 kg hangs from the end of a spring. When the brick is at rest, the spring is stretched by 3 cm. The spring is t
Zielflug [23.3K]

Answer:

Step-by-step explanation:

In this system we have the force of the spring and the gravitational force. The equation that describes that is

F_{s}+F{g}=ma\\k(y_0+y)-mg=ma

where y0 is the equilibrium position when the string is free and y0+y is the new equilibrium position when the object is hanged of the string. By replacing by derivatives we have

ky_0+ky-mg=ma\\mg+ky-mg=ky=ma\\\\ky=m\frac{d^2y}{dt^2}\\\\my''+ky=0

the solution for this differential equation is (by using the characterisic polynomial)

y(x)=Acos(kt)+Bsin(kt)\\k=\omega^2m

hope this helps!!

7 0
4 years ago
Read 2 more answers
30) Find the sine, cosine, and tangent of
Rasek [7]

Answer:

sin < C = c/a

cos < C = b/a

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8 0
3 years ago
If Greg ate 5/7 of a cake and bob ate 3/9 how much is left
laiz [17]
2 + 6 = 8. 2 is left. 6 is left.
8 0
3 years ago
Helppppppp please, all math lovers I'm calling for you​
Katen [24]

Answer:

Dive by n square root two, also option one.

Step-by-step explanation:

The first step to any algebra equation is to isolate the variable and you do that by divide square root 2 since it cancels out on the left side and now n is alone.

Hoped that helped :)

8 0
3 years ago
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