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2 years ago

Can someone pls help and ty

Mathematics

2 answers:

IgorC [24]2 years ago

7 0

Answer:

16.3

Step-by-step explanation:

I'm assuming side a is the hypotenuse.

Cosine rule is $a=\sqrt{a^{2} +b^{2}-2ab*cosC }$

so $\sqrt{10^{2}+8^{2} -2*10*8*cos130}$ = 16.33542217

The attached picture is a diagram if you are confused

The labelling of the sides doesn't matter as long as the unknown side is c

SOVA2 [1]2 years ago

4 0

Answer:

well its obtuse and obtuse triangles are more than a right angle or should i say not 90* degrees

Step-by-step explanation:

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Nata [24]

Answer: 15, -8

Step-by-step explanation:

$u_2=7\\u_2=u_1+r\\u_3=u_1+2r\\u_4=u_1+3r\\\\u_1+u_2+u_3+u_4=4u_1+6r=12\\u_1+r=7\\\\$

$\left \{ \begin {array} {ccc|c|c}u_1+r&=&7&-4&-6\\4u_1+6r&=&12&1&1\\\end {array} \right.\\\\\\\left \{ \begin {array} {ccc}2r&=&-16\\-2u_1&=&-30\\\end {array} \right.\\\\\\\left \{ \begin {array} {ccc}r&=&-8\\u_1&=&15\\\end {array} \right.\\\\\\Proof:\\u_1=15\\u_2=7\\u_3=-1\\u_4=-9\\sum=12\\$

6 0

2 years ago

What's the smallest number made with a 6 in the ones place

Alexus [3.1K]

The answer is 6 I'm happy to help

6 0

2 years ago

KX equals X +4 find K7

Andre45 [30]

KX = x+4 so solve for k.
Divide both sides of the equation by x and you get K=4.
Plug it in, and you get (4)(7)=28
Your answer is 28.

5 0

2 years ago

Simplify (7xy)^2 ????

Mazyrski [523]

Answer:

Simplify the expression.

49 x2y2

6 0

2 years ago

Use the net to find the lateral area of the cylinder.

navik [9.2K]

Hi there!

The formula for the lateral area of a cylinder is LA = 2 x pi x r x h. Using this formula, we can plug in the given values and solve for the lateral area.

WORK:
LA = 2pi x r x h
LA = 2pi x 4.5 x 17
LA = 153pi mm^2

The correct answer is the first option - 153pi mm^2

Hope this helps!! :)
If there's anything else that I can help you with, please let me know!

7 0

2 years ago