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miss Akunina [59]
3 years ago
15

PLSSS HELP IF YOU TURLY KNOW THISS

Mathematics
2 answers:
Montano1993 [528]3 years ago
6 0
It is 7

2*2x = 4x + 2 = 30

4x = 28

x = 7
andrew-mc [135]3 years ago
5 0

Answer:

2(2x + 1) = 30 \\ 4x + 2 = 30 \\ 4x = 30 - 2 \\ 4x = 28 \\ x =  \frac{28}{4}  \\ \boxed{ x = 7}

  • <u>x = 7</u> is the right answer.
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A) 77°<br> C) 109°<br> B) 167°<br> D) 150°
Grace [21]

Answer:

Wat is the question?

Step-by-step explanation:

5 0
3 years ago
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Which exponential function goes through the points (1, 8) and (4, 64)?
Mama L [17]
An exponential function can be expressed as:

y=ab^x  we have two points so we can solve

64/8=(ab^4)/(ab^1)

8=b^3

2=b, now we have:

y=a(2^x), using point (4,64)

64=a(2^4)

64=16a

4=a so

y=4(2^x)
6 0
3 years ago
The areas of two similar triangles are 18 cm^2 and 8 cm^2. One of the sides of the first triangle is 4.5 cm. What is the length
Nataly_w [17]

Answer:

  3 cm

Step-by-step explanation:

The ratio of areas of similar figures is the square of the ratio of linear dimensions. That means the ratio of linear dimensions is the square root of the area ratio. The ratio of the smaller triangle dimensions to the larger is then ...

  k = √((8 cm^2)/(18 cm^2)) = √(4/9) = 2/3

Then the corresponding side of the smaller triangle is ...

... k · (4.5 cm) = (2/3)·(4.5 cm) = 3 cm

5 0
3 years ago
Given sinθ=- 3/5 and cscθ=-5/3 in quadrant III, find the value of other trigonometric functions using a Pythagorean Identity. Sh
Yakvenalex [24]
Let ABC be a triangle in the 3rd quadrant, right-angled at B. 
 So, AB-> Perpendicular BC -> Base AC -> Hypotenuse. 
Given: sinθ=-3/5 cosecθ=-5/3 
 According to Pythagorean theorem, square of the hypotenuse is equal to the sum of square of the other two sides.
 Therefore in triangle ABC, 〖AC〗^2=〖AB〗^2+〖BC〗^2 ------
--(1)
 Since sinθ=Perpendicular/Hypotenuse ,
 AC=5 and AB=3
 Substituting these values in equation (1)
 
〖BC〗^2=〖AC〗^2-〖AB〗^2

 ă€–BC〗^2=5^2-3^2
 

 ă€–BC〗^2=25-9

 ă€–BC〗^2=16

 BC=4 units

 Since the triangle is in the 3rd quadrant, all trigonometric ratios, except tan
and cot are negative.
 So,cosθ=Base/Hypotenuse Cosθ=-4/5 
 secθ=Hypotnuse/Base secθ=-5/4 
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4 0
3 years ago
What is the root of the quadratic equation x^2 - 8x + 16 = 0
Semenov [28]

Answer:

(x - 4)(x - 4)

x = 4

Step-by-step explanation:

x² - 8x + 16

= (x - 4)(x - 4)

x - 4 = 0

x = 4

3 0
3 years ago
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