2 years ago

HELP PLEASE! 15 POINTS

Mathematics

2 answers:

Goshia [24]2 years ago

8 0

Answer:

Its 58

Step-by-step explanation:

2+2+2+2+2+4+4+4+6+10+10=58 but the closest number to it is 56

Arte-miy333 [17]2 years ago

4 0

Is the last one 56 because it will be 58 but the closest will 56

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Find the values of x and y

zhuklara [117]

You can use a tangent:

$tangent=\dfrac{opposite}{adjacent}$

We have opposite = 17 and adjacent = x.

$\tan30^o=\dfrac{\sqrt3}{3}$

substitute:

$\dfrac{17}{x}=\dfrac{\sqrt3}{3}$ cross multiply

$x\sqrt3=(3)(17)$ multiply both sides by √3

$x(\sqrt3)(\sqrt3)=51\sqrt3$

$3x=51\sqrt3$ divide both sides by 3

$x=17\sqrt3$

Use the Pythagorean theorem:

$y^2=(17\sqrt3)^2+17^2\\\\y^2=289(\sqrt3)^2+289\\\\y^2=289\cdot3+289\\\\y^2=867+289\\\\y^2=1156\to y=\sqrt{1156}\\\\y=34$

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Other method.

$30^o-60^o-90^o$ triangle.

The sides are in the ratio $1:2:\sqrt3\to17:y:x$

Therefore

$17:(2\cdot17):(17\sqrt3)\to17:34:17\sqrt3\to x=34,\ y=17\sqrt3$

4 0

3 years ago

7 less than 4 times a number is 5 less than 6 times the same number. Find the number.

Alex73 [517]

Answer: -1

Step-by-step explanation:

(4*X-7) = (6X -5)

4X -7 = 6X - 5

2X = -2

X = -1

5 0

2 years ago

4×+5y=20<br><img src="https://tex.z-dn.net/?f=4%20%5Ctimes%20%20%2B%205y%20%3D%2020" id="TexFormula1" title="4 \times + 5y = 20

aksik [14]

4+5y=20
-4 -4
------------------
5y=16
Divide by 5 on both sides

y=3.2
I hope this is what u wanted. :)

8 0

3 years ago

If a is one-factor x, what is the other factor

NARA [144]

B-y is the another factor

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3 years ago

Can someone please help me I really need help please <br> I don’t understand this

anastassius [24]

Step-by-step explanation:

fill up

1. 196

2. 625

3 . 429

7 0

3 years ago