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3 years ago

Adding and subtracting fractions

Mathematics

2 answers:

Tema [17]3 years ago

6 0

Answer:

Is possible

Step-by-step explanation:

It is possible to add and subtract fractions

marin [14]3 years ago

4 0

Answer:

it is possible to add and subtract fractions

Step-by-step explanation:

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Use identities to find the values of the sine and cosine functions for the following angle measure.

puteri [66]

Using the cosine double angle formula,

$\cos 2\theta=2\cos^2 \theta-1=\frac{12}{13}\\\\2\cos^{2} \theta=\frac{25}{13}\\\\\cos^{2} \theta=\frac{25}{26}\\\\\boxed{\cos \theta=\frac{5}{\sqrt{26}}}$

(Note I took the positive case since $\theta$ terminates in the first quadrant)

Using the Pythagorean identity,

$\sin^2 \theta+\cos^2 \theta=1\\\\\sin^2 \theta+\frac{25}{26}=1\\\\sin^2 \theta=\frac{1}{26}\\\\\boxed{\sin \theta=\frac{1}{\sqrt{26}}}$

(Note I took the positive case since $\theta$ terminates in the first quadrant)

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1 year ago

A trapezoid has a base of two and six and an area of 24 square units. What is the height?

Nezavi [6.7K]

$\bf \textit{area of a trapezoid}\\\\ A=\cfrac{h(a+b)}{2}~~ \begin{cases} a,b=&\stackrel{bases}{parallel}\\ &sides\\ h=&height\\ \cline{1-2} a=&2\\ b=&6\\ A=&24 \end{cases}\implies 24=\cfrac{h(2+6)}{2}\implies 24=\cfrac{h(8)}{2} \\\\\\ 24=4h\implies \cfrac{24}{4}=h\implies 6=h$

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3 years ago

Given that 100,000 centimeters is equal to 1 kilometer, convert 3.4 kilometers to centimeters.

zloy xaker [14]

Answer:

3.4 km = 3.4 * 100,000 cm = 340,000 cm

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3 years ago

Hey anybody able to help? Which expression is equivalent to -5(3x-6/7)?

nalin [4]

Answer:

A: - 15x - 30/7

Step-by-step explanation:

-5 (3x - 6/7)

Just distribute -5 to the values inside the parentheses.

-5 · 3x = -15x

-5 · 6/7 = -30/7

Now form it together:

-15x - 30/7

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3 years ago

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Meg dilated triangle W by a factor less than 1. Then she performed other transformations that were not dilations to create simil

Andrew [12]

Answer: A. X(–2, 2), Y(–10, 2), Z(–6, 10)

Step-by-step explanation: This looks a bit tough, but knowing that scale factors less than 1 are ½, ¼, etcetera, I come to this answer, also knowing that in the end, they must have an unproportional relationship.

I hope this is correct, and as always, I am joyous to assist anyone at anytime.

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2 years ago

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