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3 years ago

Need help Urgently, Easy question Find x.

Mathematics

2 answers:

alexira [117]3 years ago

8 0

You add 25 and 22 and it adds up to 47 so the answer is 47

vazorg [7]3 years ago

8 0

a^2+b^2=c^2 formula can be +used here.

22^2 = 484 and 25^2 = 625

x+484 = 625

625-484 =141

square root of 141 is around 11.8, so between 11 and 12

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Find the value of x. Round to the nearest whole number.

IrinaVladis [17]

Use trigonometry.

sin x = opposite ÷ hypotenuse

sin x = 7/9

Take the arcsin on both sides.

arcsin(sin x) = arcsin(7/9)

x = 51.057558731

Rounding to the nearest whole number means to round to the ones place.

Answer: x = 51 degrees

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3 years ago

Solve the simultaneous equations<br> 4x + 3y = 20<br> 4x + 2y = 14

fiasKO [112]

Step-by-step explanation:

$\underline{ \underline{ \text{Given}}} :$

$\tt{4x + 3y = 20........... \text{ equation \: ( \: i \: )}}$
$\tt{4x + 2y = 14.......... \text{equation \: (ii)}}$

$\underline{ \text{USE \: ELIMINATION \: METHOD}} :$

Subtract equation ( ii ) from equation ( i ) :

Remember that the sign of each term of the second expression changes i.e equation ( i ) now becomes -4x -3y = -20

$\tt{ \cancel{4x }+ 2y = 14}$

$\tt{ \cancel{ - 4x} - 3y = - 20}$

__________________

$\tt{ - y = - 6}$

⟿ $\tt{ \boxed{ \tt{y = 6}}}$

Again , Substituting the value of y in equation ( ii ) :

⟿ $\tt{4x + 2 \times 6 = 14}$

⟿ $\tt{4x + 12 = 14}$

⟿ $\tt{4x = 2}$

⟿ $\boxed{ \tt{x = \frac{1}{2}}}$

$\red{ \boxed{ \boxed{ \tt{Our \: final \: answer : x = \frac{1}{2 } \: and \: y = 6}}}}$

Hope I helped ! ツ

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2 years ago

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sergeinik [125]

Answer is 5 calories/min

75 divided by 15 is 5

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3 years ago

Read 2 more answers

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Ksenya-84 [330]

Answer:

a) 10,61

Step-by-step explanation:

31/3 = 10,33333...

2/7 = 0,28571428...

10,33 + 0,28 = 10,61

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3 years ago

Find the sum of the first 6 terms in the following series. 6+(-18)+54+(-162)

lapo4ka [179]

Step-by-step explanation:

6+(-18)+54+(-162)

6-18+54-162

-12+(-108)

-12-108

= -120

3 0

3 years ago

Read 2 more answers