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weeeeeb [17]
2 years ago
7

Find the value of a and b

Mathematics
1 answer:
Luba_88 [7]2 years ago
3 0

Answer:

a = 60

b = 60

Step-by-step explanation:

We know that BC is 90°, because of the square thingy.

YB is 30°.

Now we do 180 - 30 - 90 = 60 (180 is the straight angle)

60  = b

Then a is the same.

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I need help!!! ill give brain-list!!!
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5 0
3 years ago
The sum of two numbers is 25. One of the numbers is fifteen less than the other. Find the numbers.
bija089 [108]

20+5 because 5 is 15 less than 25.

4 0
3 years ago
Read 2 more answers
472 + 278 + 694 + 73 + 217 =<br>O 1,734<br>1,824<br>O 1,714<br>O 1,634​
hichkok12 [17]

Answer:

1734

Step-by-step explanation:

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4 0
3 years ago
Read 2 more answers
❤please help on math thanksssss
WARRIOR [948]

Answer:

the answer to the first one would be: 4/3

the second problem's answer: 20/36, which can be reduced to 5/9

3 0
3 years ago
The height of a triangle is 12 centimeters more than its base. The area of the triangle is 189 square centimeters Find the base
telo118 [61]

Answer:

C

Step-by-step explanation:

the area of a triangle is

baseline × height / 2

so, we know in our case

b(b+12) = 189 cm²

b² + 12b - 189 = 0

let's try to solve this by completing the square.

that means we try to find the expression

(b + k)² + c

that is equal to

b² + 12b - 189

(b + k)² + c = b² + 2kb + k² + c = b² + 12b - 189

so,

2k = 12

k = 6

and then

k² + c = -189

6² + c = -189

36 + c = -189

c = -225

(b + 6)² - 225 = 0

(b + 6)² = 225

b + 6 = 15

b = 9

so, the baseline b = 9 cm.

the height b+12 = 9+12 = 21 cm.

6 0
2 years ago
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