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Artyom0805 [142]

2 years ago

14

Soma de frações com uma incógnita

2 answers:

Licemer1 [7]2 years ago

6 0

Aqui está um exemplo:
3/9-X/X = 2/9
Que é 3/9-1/2 = 9/9
Boa sorte!

Elena-2011 [213]2 years ago

4 0

Answer:

é só vc multiplicar cruzado

Step-by-step explanation:

exemplo: 4 X = 5x= 20 X= 4

5 5

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Solve for m.<br><br> m+14<−1 2/5

sergejj [24]

Step-by-step explanation:

Hey where you went give me your mail id

3 0

2 years ago

A tree casts a shadow 21m long. The angle of elevation of the sun is 55 degrees. What is the height of the tree?

Orlov [11]

Answer:

The height of the tree is about 30 feet.

Step-by-step explanation:

tan(55) = h/21

*21 *21

21*tan(55)=h

29.99=h

h=29.99=30 feet

4 0

2 years ago

Use the reference angles to find the exact value of the expression cot -11 pi/6. Do not use a calculator

laiz [17]

Answer:

$\sqrt{3}$

Step-by-step explanation:

cot(-11pi/6)=cot(-pi-5pi/6)= -cot(5pi/6)=cot(pi/6)= $\sqrt{3}$ ≈1.73

7 0

2 years ago

Your friend deposits $8,000 in an investment account that earns 2% annual interest. Find the balance after 10 years when the int

Vlada [557]

Answer:

$9,769.60

Step-by-step explanation:

A = 8000[1 + (.02/12)]^12·10

5 0

2 years ago

6. A prism has bases that are equilateral triangles with sides lengths of 10 inches and a length of 30 inches.

vova2212 [387]

Answer:

The volume of the prism is $1,299\ in^{3}$

Step-by-step explanation:

we know that

The volume of the prism is equal to

$V=BL$

where

B is the area of the triangular base

L is the length of the prism

we have

$L=30\ in$

<em>Find the area of the base B</em>

The area of a equilateral triangle is equal to

$B=\frac{1}{2}(10)^{2} sin(60\°)$

$B=25\sqrt{3}\ in^{2}$

substitute

$V=(25\sqrt{3})(30)=1,299\ in^{3}$

4 0

3 years ago