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Llana [10]
3 years ago
8

[y = 4x] [x + y = 5]

Mathematics
1 answer:
alexandr1967 [171]3 years ago
5 0
X=1, y=4

Substitute 4x in for y in the second equation and you get 5x=5. Divide out 5 and you get x=1. Then, you can plug 1 in for x into either equation and solve for y.
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Find the value of x ?!??
goldfiish [28.3K]

Answer:

x=4

Step-by-step explanation:

Pentagon's sum of interior angle is 540°

let's add all the given degrees

100+20x+16x+16+140+160-5x=540

Collect like terms

100+16+140+160+20x+16x-5x=540

416+31x=540

31x=540-416

31x=124

x=124/31

x=4```

5 0
3 years ago
when 5 is subtracted from 3 times number the result greater than 6 .find the least whole number that satisfied the statement​
Alexandra [31]

Answer:

4

Step-by-step explanation:

Let x be a number.

The statement can be interpreted as:

  • 5 is subtracted <u>from</u> a number : x - 5
  • 3 times a number : 3x
  • A number is greater than 6 : x > 6
  • When 5 is subtracted <u>from</u> 3 times a number, the result is greater than 6 : 3x - 5 > 6

And then we simplify 3x - 5 > 6:

  • 3x - 5 > 6
  • 3x > 11
  • x > 11/3
  • x >  3.666...

To get the smallest whole number satisfying the inequality above, we can take the "ceiling" of 3.66 which is 4.

Note:

The ceiling of a number is the nearest integer (or in this case, nearest whole number) of a number. It can be denoted by ceil(x).

For example, the ceiling of 0.1 is 1. The ceiling of 5 is 5 since 5 itself is a integer.

3 0
4 years ago
Please help me with this!!!! Tyyyyyy
Anna35 [415]

Answer:

Step-by-step explanation:

I don't know what it's asking for but I assume what is angle B so we'll go with that. I think it's B 129 because it's right across from angle F which looks almost identical and is 130 degrees that's a 1 degree difference.

4 0
3 years ago
The intensity of an earthquake with a magnitude of 2 is how many times greater than the intensity of an a standard earthquake ?
Ksju [112]

Answer:  

The intensity of an earthquake with a magnitude of 2 is 100 times greater than the intensity of a standard earthquake.

Explanation:  

The magnitude of earthquakes is given by

Magnitude=log\frac{I}{S}

2=log\frac{I}{S}\\

Where I is the intensity of earthquake and S is the intensity of standard earthquake.

The magnitude of standard earthquakes is given by

Magnitude=log\frac{S}{S}= log(1) = 0

So comparing the magnitude of the given earthquake and standard earthquake,

log\frac{I}{S} = log\frac{S}{S}

log\frac{I}{S} - log\frac{S}{S}

log(2) - log(1)

2 - 0

2

which means that

10^2 = 100 times greater

Therefore, the intensity of an earthquake with a magnitude of 2 is 100 times greater than the intensity of a standard earthquake.

6 0
3 years ago
4 to the power of3 -(2+2to the power of 3) x 5​
IRINA_888 [86]

Answer:

14

Step-by-step explanation:

Given the following equation;

4³ - (2 + 2³) * 5

4*4*4 - (2 + 2*2*2) * 5

64 - (2 + 8) * 5

64 - (10) * 5

64 - 50 = 14

Note: the rule of BODMAS was applied.

8 0
3 years ago
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