3 years ago

Pls answer I need hellpplp

Mathematics

1 answer:

IgorC [24]3 years ago

5 0

Answer:

Step-by-step explanation:

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19. If the base is 4, what is the value if the exponent is 2? What if the exponent is -2?

Stells [14]

Answer:

16, 1/16

Step-by-step explanation:

$(4)^2 =16$

$(4)^{-2} =\frac{1}{16}$

Hope it helps you in your learning process.

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2 years ago

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Solve for x in the triangle,round your answer to the nearest tenth

Nuetrik [128]

Cosine = adjacent / hypotenuse

cos (49)= x/27
27 * cos(49) = x
27 * 0.656 = x
x = 17.7

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3 years ago

What is the y-intercept of the equation of the line that is perpendicular to the line y = 3/5 x + 10 and passes through the poin

TiliK225 [7]

Answer:

$\large\boxed{y-intercept=20}$

Step-by-step explanation:

$\text{Let}\ k:y=_1x+b_1\ \text{and}\ l:y=m_2x+b_2.\\\\l\ \perp\ k\iff m_1m_2=-1\to m_2=-\dfrac{1}{m_1}\\============================\\\\\text{We have}\ y=\dfrac{3}{5}x+10\to m_1=\dfrac{3}{5}.\\\\\text{Therefore}\ m_2=-\dfrac{1}{\frac{3}{5}}=-\dfrac{5}{3}.\\\\\text{The equation of the searched line:}\ y=-\dfrac{5}{3}x+b.\\\\\text{The line passes through }(15,\ -5).$

$\text{Put thecoordinates of the point to the equation.}\ x=15,\ y=-5:\\\\-5=-\dfrac{5}{3}(15)+b\\\\-5=(-5)(5)+b\\\\-5=-25+b\qquad\text{add 25 to both sides}\\\\b=20\\\\\boxed{y=-\dfrac{5}{3}x+20}$

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3 years ago

Each year a school organises a concert.

ZanzabumX [31]

Answer:

A) i 346.5

ii 346.5

B) I 115 tickets

ii $430

iii 4.88%

C) 129

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2 years ago

Students are planning a 3-day hiking trip in the mountains. The hike covers a distance of 18.5 kilometers. The students hike 0.2

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9.11 kilometers
18.5 - 0.28 = 18.22
18.22 / 2 = 9.11

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4 years ago