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11111nata11111 [884]
3 years ago
10

Find x show workings - i will mark brainliest

Mathematics
2 answers:
slava [35]3 years ago
8 0

Step-by-step explanation:

Since we know that it is an isosceles triangle those to base angles are equal which mean 70°,70° now

we are left to find the upper angle let name it y

so to find

it will be

70°+70°+y=180°(angles in a triangle)

y+140=180

simplify

you will get y to be 40°

which means y=40°

now to find x

y+x=180°(angles on a straight line)

x+40°=180°

x=140°

alexandr1967 [171]3 years ago
7 0

Answer: x=140 Step-by-step explanation:

70 +70 =140

180-140=40

180-40=140

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I need help on this
mamaluj [8]

for how many digits is rounding required to occur?

if it's one digit, it should be 70,000 and 20,000

if it's two digits it would be 75,000 and 23,000

if it's three digits it would be 74,700 and 22,900

if it's four digits it would be 74,710 and 22,980

7 0
3 years ago
The trifecta at most racetracks consists of selecting the​ first-, second-, and​ third-place finishers in a particular race in t
MAVERICK [17]
Since you have 11 entries, you have 11 possible winners.
For each winner, you have 10 possible second-place finishers.
For each pair first-second place, you have 9 possible 3rd place finishers.

The possibilities are 11×10×9 = 990
Therefore, you have to buy 990 tickets.
6 0
4 years ago
Clarence solved the equation 3x + 15 = 33 and showed the following work. 3x + 15 = 33 3x + 15 - 15 = 33 3x = 33 = x = 11 Which o
Ne4ueva [31]
3x + 15 = 33
3x = 33 - 15
3x = 18
x = 18/3
x = 6 <==
7 0
3 years ago
Read 2 more answers
Which expression is equivalent to 5(4x+3) - 2x
Troyanec [42]

Good evening  

Answer:

  1. 18x + 15
  2. 3(6x + 5)

Step-by-step explanation:

Unfortunately you didn’t provide the expressions to chose from ,however we can get other expressions From this one like this:

5(4x+3) - 2x = 20x + 15 - 2x

                   = (20x - 2x) + 15

                   = 18x + 15

we can also write 18x + 15 = 3×(6x) + 3×(5x) = 3(6x + 5)

then

these two expressions :

  • 18x + 15
  • 3(6x + 5)

are equivalent to 5(4x+3) - 2x

__________________________________________

:)

6 0
4 years ago
a square with an area of 144 cm² is reduced by a factor of 1/3 how long are the new sides of the square?​
olga55 [171]

Answer:

4  cm

Step-by-step explanation:

The square root of 144 is 12 (12 x 12 = 144) so we know our sides of the square are 12 cm²

12 / 3 = 4

(\frac{12}{1} x \frac{1}{3})

The sides of the new square are 4 :)

Hope this helps and is correct, have a nice day! :D

3 0
3 years ago
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