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Doss [256]
3 years ago
12

4/9x+1/5x=87 what is x

Mathematics
2 answers:
Natali5045456 [20]3 years ago
5 0
First you need to find a common denominator.

20/45x + 9/45x = 87

Combine like terms.

29/ 45x = 87

Multiply both sides by 45/29

x = 3,915 / 29

x = 135

Hope this helps!
IceJOKER [234]3 years ago
3 0

Answer:

The value of x is 135.

Step-by-step explanation:

Given : Expression \frac{4}{9}x+\frac{1}{5}x=87

To find : What is the value of x?

Solution :

Expression \frac{4}{9}x+\frac{1}{5}x=87

Take LCM,

\frac{4x\times 5+x\times 9}{9\times 5}=87

\frac{20x+9x}{45}=87

\frac{29x}{45}=87

x=\frac{87\times 45}{29}

x=135

Therefore, The value of x is 135.

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Which relation is a function of x?
Lynna [10]

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The fourth option with x values of -3,-2,4 and 7 is a function of x.

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There are two non congruent triangles where B=55 degrees a=15 and b=13. Find the measures of the angles of the triangle with the
liq [111]

Answer:

The side c needs to be 12.85 for the triangle to have greatest perimeter

Step-by-step explanation:

We are given;

b = 13

a = 15

Angle at b: B = 55°

Let's find side c.

Using the law of cosines,we have;

b² = a² + c² - 2ac•cos(B)

13² = 15² + c² - 2•15•c•cos(55)

169 = 225 + c² - 30c•cos(55)

c² - 30c•cos(55) + 225 - 169 = 0

c² - 30c•cos(55) + 56 = 0

c² - 30c•(0.5736) + 56 = 0

c² - 30c•(0.5736) + 56 = 0

c² - 17.208c + 56 = 0

Using quadratic formula;

c = [-(-17.208) ± √((-17.208)² - (4•1•56)]/2(1)

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To have the greater perimeter, we need the larger value of c, thus we will use the positive sign and ignore the negative one ;

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5 0
3 years ago
At a concession stand, a pickle and two bags of chips costs a total of $3.25. Three pickles and four bags of chips costs a total
kolbaska11 [484]

Answer:

A bag of chips costs $1

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Step-by-step explanation:

P + 2c = 3.25                            Start with these two equations

3p + 4c = 7.25

p = -2c + 3.25                           Solve for one variable

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-2c = -2

c = 1

p + 2(1) = 3.25                           Substitute

p + 2 = 3.25

p = 1.25

4 0
3 years ago
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