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3 years ago

I need help for this problem.

Mathematics

2 answers:

Lelechka [254]3 years ago

7 0

Answer:

Step-by-step explanation:

Equation

12x + (8x + 5) + 15x = 180 All triangles have 180o for their interior angles.

12x + 8x + 5 + 15x = 180 Combine like terms on the left

35x + 5 = 180 Subtract 5 from both sides

- 5 -5

35x =175 Divide by 35

x = 5

It's not clear what you want. x = 5 is one possibility

12x = 60

15x = 75

8x+5=45

is another possiblity

Harrizon [31]3 years ago

3 0

Answer:

Step-by-step explanation:

12x+15x+8x+5=180 degree(being sum of interior angles of a triangle)

35x=180-5

x=175/35

x=5

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Select the two values of x that are roots of this equation 3x^2 + 1 =5x

Zina [86]

Answer:

x = 1.434 and x=0.232

Step-by-step explanation:

To find the root of the equation stated above we need to:

(1) Write the polynomial equation with zero on the right hand side:

$3x^{2} + 1 = 5x$ ⇒ $3x^{2} -5x + 1 = 0$

(2) Divide the whole equation by 3

$3x^{2} -5x + 1 = 0$ ⇒ $x^{2} -\frac{5}{3}x + \frac{1}{3}= 0$

(3) Use the quadratic formula to solve the quadratic equation:

The quadratic formula states that the two solutions for a quadratic equation is given by:

$\frac{-b±\sqrt{b^{2} - 4ac}}{2a}$ (1)

In this case, a = 1, b = $-\frac{5}{3}, c= \frac{1}{3}$

Substituiting a, b and c in equation (1) We get:

$\frac{-\frac{5}{3}±\sqrt{(-\frac{5}{3})^{2} - 4(1)(\frac{1}{3})}}{2(1)}$ (1)

The two solutions are:

x = 1.434 and x=0.232

8 0

3 years ago

<img src="https://tex.z-dn.net/?f=%20ln%283x%20%2B%204%29%20%3D%20%20-%205" id="TexFormula1" title=" ln(3x + 4) = - 5" alt=" ln

balandron [24]

The answer is negative three

6 0

3 years ago

Is 9 ft greater than 4 yards

Sedbober [7]

Find what 9 ft is equal to. 9 ft equals 3 yards. 4 yards equals 12 ft. So the answer is No. 9 ft is not greater than 4 yards. Hoped I helped. :)

7 0

3 years ago

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Suppose you are making a model where one block represents 5 feet. About how many blocks tall is your model of the Empire State B

Ymorist [56]

Answer:
250 blocks

Scale factor:

Explanation:
1,250/5=250

3 0

3 years ago

Rationalise the denominator√3-√5/√7-√6

sammy [17]

Answer:

√21 + 3√2 - √35 - √30

Step-by-step explanation:

Given :-

√3 - √5 / √7 - √6

Solving :-

= √3 - √5 (√7 + √6) / √7 - √6 (√7 + √6)

= √21 + √18 - √35 - √30 / 7 - 6

= √21 + 3√2 - √35 - √30

Solution :-

√21 + 3√2 - √35 - √30

3 0

2 years ago

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