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Norma-Jean [14]
3 years ago
5

Please help Due asap SHOW a workings please

Mathematics
1 answer:
kiruha [24]3 years ago
8 0

Answer:

A

Step-by-step explanation:

1) first there are a few rules we need to know:

a) the sum of any two sides of a triangle is always larger than the 3rd side

b) the difference between any two sides of a triangle is always smaller than the 3rd side;

hence,

3+4=7

4-3=1

triangle 3,4,5 follows all the rules,

triangle 13,2,11:

11+2=13

the sum of any two sides must always be GREATER than the 3rd side-so this is not an option

triangle 10,4,5

5+4=9

9<10

not an option

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If 12% of the air leaks out of Brian's bicycle tire every day, what percent of the air will be left after 2 days? After a week?
Leni [432]

Answer:

77.44%

49.87%

Step-by-step explanation:

If 12% leaks everyday, on the first day 12% would leak, leaving 100 - 125 = 88% of air

on the second day, 12% of 88% would leak = 0.88 x 0.12 = 0.1056

Air left on the second day = 88% - 10.56% = 77.44%

After a week = (100 - 12%)^7 = 49.87%

6 0
2 years ago
Determine the value of the variable. 5 + 17 = J - 14
Nataly_w [17]
You would add 5 and 17 and that would equal 22
Now it would be 22=J-14
Then add 14 on both sides so it cancels out 22 plus 14 is 36
So J would equal 36
3 0
2 years ago
Read 2 more answers
What is the solution to this equation <br> 4x+x-15+3-8x=13
Fynjy0 [20]
5x -15 + 3 -8x = 13
5x  -12 -8x = 13
5x -8x =13 -12
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x = -1/3
3 0
3 years ago
Add the first 12 terms of this sequence:<br> 15, 45, 135, 405, 1215, ...
UkoKoshka [18]

Answer:

Step-by-step explanation:

a₁ = 15

a₂/a₁ = 45/15 = 3

a₃/a₂ = 135/45 = 3

...

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Sum of first 12 terms = a₁·(1-r¹²)/(1-r)

= 15·(1-3¹²)/(1-3)

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7 0
3 years ago
What is the value of x in the equation
MrRissso [65]

Answer:

x = -3

Step-by-step explanation:

In an equation our aim is to find the value of what we are looking for as well as keeping the equation balanced. For example if we took away 1.4 only from one side then the equation would change so it's an important rule to keep in mind when solving equations, that you need to keep both sides of the equation the same.

0.7x - 1.4  = -3.5

→ First multiply everything by 10 to make everything into a whole number

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7x = -21

→ Divide both sides by 7 to isolate 7

x = -3

8 0
3 years ago
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