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2 years ago

HEEELLPPPPPPPPP PLEAS

Mathematics

2 answers:

krek1111 [17]2 years ago

6 0

E is 2/7 if not sorry

Temka [501]2 years ago

3 0

1. -5.6
2.-10.701
3. -46.644
4. -15/14
5. 2/7

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If x=6 and y=−4, evaluate the following expression:10−4xy

Lana71 [14]

Answer:

10-(4×6×-4)

10+96

=106

Step-by-step explanation:

hope it helps

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2 years ago

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Find sin 2a and cot 2a:

geniusboy [140]

Answer:

$sin(2\alpha )=2(\frac{5}{12})(\frac{12}{13})=\frac{10}{13}\\cot(2\alpha ) = \frac{16511}{18720}$

Step-by-step explanation:

$\text{if } cos(\alpha)=\frac{12}{13}\\\text{That must mean we have a triangle with base 12, and hypotenuse 13.}\\\text{Using Pythagoras, we can determine the base of the triangle must be 5.}\\a^2+b^2=c^2 \text{, where c is the hypotenuse and a, b are the two other sides.}\\c^2-b^2=a^2\\\sqrt{c^2-b^2}=a\\\sqrt{13^2-12^2}=\sqrt{169-144}=\sqrt{25}=5\\\text{Therefore, }sin(\alpha) = \frac{5}{12}\\sin(2\alpha)=2sin(\alpha )cos(\alpha)\\\text{(From double angle formulae identities)}\\$

$sin(2\alpha )=2(\frac{5}{12})(\frac{12}{13})=\frac{10}{13}\\cos(2\alpha )=cos^2(\alpha)-sin^2(\alpha)\\cos(2\alpha )=(\frac{12}{13})^2-(\frac{5}{12})^2=\frac{16511}{24336}\\cot(2\alpha)=\frac{cos(2\alpha)}{sin(2\alpha)}=\frac{\frac{16511}{24336}}{\frac{10}{13}}=\frac{16511}{18720}$

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2 years ago

Which line segment is drawn in the figure? A.YZ B.WY C.XZ D.WZ

Dima020 [189]

The line segment shown in the figure is C. XZ. A line segment is a line that is bounded by 2 endpoints, hence the line is not infinite. As shown in the figure, only points X and Z are visibly connected. There are no visible lines connecting the other points together.

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The slope i don’t understand rise/run

mel-nik [20]

Answer:

-1

Step-by-step explanation:

The full equation is y= -1x + 2

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2 years ago

30+5y_>4x I need the answer ASAP

Gre4nikov [31]

30+5y_>4x
5y_>4x-30
The answer is: y_>(4/5)x-6

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2 years ago