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lyudmila [28]
3 years ago
14

7y-23 plus 23x-16 plus 8x -21 find x and Y show steps please

Mathematics
1 answer:
Solnce55 [7]3 years ago
6 0
7y - 23 + 23x -16 + 8x - 21  
31x + 7y - 60  
What is the original problem equal to? You can't go any further unless you know.
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If two angles are suplementar ang congruent, the measure of each angle is 90 degree true or false
Westkost [7]

True, bc they add up to 180 and are the same size.

3 0
3 years ago
The height of a triangle is 8 centimeters greater than half its base. The area of the triangle is 48 square centimeters what is
emmainna [20.7K]

Answer:

base = 8 cm

height = 12 cm

Step-by-step explanation:

We will need the formula for area of a trianlge, which is

A = (1/2)bh    where b is the base, and h is the height

We are given two formulas...

"The height of a triangle is 8 centimeters greater than half its base" becomes

  h = (1/2)b + 8

"The area of the triangle is 48 square centimeters" becomes

48 = (1/2)bh

Plug the first formula into the second to solve for h

48 = (1/2)b[(1/2) + 8]             (h becomes (1/2)b + 8)

Now solve for b

48 = (1/4)b² + 4b

**This is a quadratic euquation.  Solve using factoring...

(1/4)b² + 4b - 48 = 0       (subtract 48 from both sides)

b² + 16b - 192  =  0       (multiply by 4 so b² is by itself, it's easier to factor this way)

Now factor...

(b + 24)(b - 8) = 0       (you need two numbers that add to 16 and multiply to -192)

Set each binomial equal to zero and solve for b

b + 24 = 0          

    b = -24    

**this anwser is not valid because b is a length, and you can't have negative length

b - 8 = 0

  b = 8        

Since the other solution is invalid, the base is b

If the base is b, then the height is...

h = (1/2)b + 8

 

   h = (1/2)(8) + 8

     h = 4 + 8

 

         h = 12

8 0
3 years ago
Triangle B = 10cm <br>H = 4cm<br>area =​
charle [14.2K]

Answer:

I think it's 20

Step-by-step explanation:

10x4÷2 because vase times height,the divide by 1/2 which it 2 so answer is 20

3 0
2 years ago
The circumference of Z is 84 cm. What is the length of xy (the minor arc)?
Orlov [11]

Answer:21 cm

Step-by-step explanation: The circle's circumference is 84 cm. 84 / 4 = 21. Therefore the length of the arc XY is 21 cm.

6 0
2 years ago
Multiply. Write the product in simplest form. 6/7 × 6/11 steps and how to. and work
Triss [41]

multiply 6 x 6 to get 36 and 7 x 11 to get 77.

6/7 x 6/11 = 36/77

5 0
3 years ago
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