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3 years ago

Help the question is about finding the angle on a triangle and this is 7th grade stuff

Mathematics

2 answers:

ArbitrLikvidat [17]3 years ago

7 0

Answer: 126

Step-by-step explanation:

3x + (5x-6) = 90

So when we solve it we get x = 12

As we know x=12, we can solve for 5x-6 which will equal

5(12)-6 = 54

To find the exterior angle, you now subtract

180-54= 126

weqwewe [10]3 years ago

4 0

Yo sup??

by angle sum property of a triangle we can say

5x-6+3x+90=180

8x=84

x=10.5

Hope this helps

You might be interested in

almond37 [142]

Radio Barn : 200 + .15 x x = the weekly sales

Woofer: 300 + .10x

set them equal to find when they are them same

200 + .15x = 300 + .10x

subtract .10x from both sides

200 +.15x -.10x = 300 + .10x-.10x

200 +.05x = 300

subtract 200 from each side

200+.05x -200 = 300-200

.05x = 100

divide each side by .05

.05x/.05 = 100/.05

x =2000

The 2 jobs pay the same when the weekly sales are 2000 dollars

2. {x - 5 = -y}

{2y - 10 = -2x}

x-5 = -y

add 5 to each side

x = -y+5

multiply each side by -2

-2x = 2y -10

the 2 equations are the same, it has an infinite number of solutions

The system is dependent since the 2 equations are the same line

3. {2x = y - 7}

{4x - 2y - 14 = 0}

2x = y-7

subtract y-7 from each side

2x - (y-7) = 0

2x -y+7 =0

multiply by 2

4x -2y +14 =0

subtract the two equations

4x -2y +14 =0

4x - 2y - 14 = 0

---------------------------

28 = 0

since this cannot happen the lines will never cross ( parallel lines)

the system is inconsistent

5 0

2 years ago

HELP ME PLEASE IM DUMB

m_a_m_a [10]

Answer:

-17/12

Step-by-step explanation:

-(2/3)-(3/4)

-(8/12)-(9/12)

-17/12

6 0

2 years ago

Camden is working two summer jobs, making $10 per hour babysitting and making $18 per hour lifeguarding. In a given week, he can

nirvana33 [79]

Answer:

2 hours babysitting

Step-by-step explanation:

First you would multiply 14 by 9 and you would get 162

Then you would Subtract 180 by 162 and you would get 18

So than you would keep on multiplying 10 till you get 20 which would be 2

So therefore your answer would be 2

5 0

2 years ago

Can someone help me on letters B and C?

skelet666 [1.2K]

Step-by-step explanation:

if he is just talking about the length than it is,

4(13x + 8)

of he is talking about overall length he swam than,

4(13x + 8) + 3(7x - 2)

if x = 12

than

perimeter = 2l + 2b

so, after inserting the values we got,

→ 2[13(12) + 8] + 2[7(12) - 2]

→ 2 (156 + 8) + 2(84 - 2)

→ 2 × 164 + 2 × 82

→ 328 + 164

→ 492 ft. ← perimeter

and yeah, according to me

a is wrong as,

formula of perimeter = 2l + 2b or 2(l+b)

so, the answer should be,

2(13x + 8) + 2(7x - 2) or 2 [ (13x + 8) + (7x - 2)

hope this answer helps you dear...take care and may u have a great day ahead!

4 0

1 year ago

Help with 5,6,8 please

Ipatiy [6.2K]

5. B, The answer is the only one that is false
6. G, Only reasonable answer
7. D, 3/5 is equivelant to 180/300

Hope this helps :D

4 0

2 years ago