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3 years ago

Which methods correctly solve for the variable x in the equation 7 - x =18?

Mathematics

1 answer:

ollegr [7]3 years ago

7 0

The first and seconds answer would be correct, the other answers do not solve for x explicitly (by itself) or they solve for x incorrectly

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I need alittle help with this,<br><br> 9x-5y+3x+2y-4y-y

kobusy [5.1K]

Answer:

12x - 8y

Step-by-step explanation:

9x - 5y + 3x + 2y - 4y - y

9x + 3x - 5y + 2y - 4y - y

12x - 8y

4 0

3 years ago

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A regular square pyramid has base edges of length 16 and its lateral faces are inclined 30° to the base of the pyramid. What is

Helga [31]

Answer:

1) $h=\frac{8\sqrt{3}}{3}\ units$

2) $V=\frac{2,048\sqrt{3}}{9}\ units^3$

Step-by-step explanation:

Part 1) Find the height of the pyramid

we know that

$tan(30^o)=\frac{h}{(b/2)}$

where

h is the height of the pyramid

b is the length side of the square base

we have

$tan(30^o)=\frac{\sqrt{3}}{3}$

$b=16\ units$

substitute

$\frac{\sqrt{3}}{3}=\frac{h}{(16/2)}$

$\frac{\sqrt{3}}{3}=\frac{h}{8}$

$h=\frac{8\sqrt{3}}{3}\ units$

Part 2) Find the volume of the pyramid

we know that

The volume of the pyramid is equal to

$V=\frac{1}{3} Bh$

where

B is the area of the square base

h is the height of the pyramid

we have

$B=(16^2)=256\ units^2$

$h=\frac{8\sqrt{3}}{3}\ units$

substitute

$V=\frac{1}{3} (256)(\frac{8\sqrt{3}}{3})$

$V=\frac{2,048\sqrt{3}}{9}\ units^3$

8 0

3 years ago

Plz help me or I will get my phone taken away

LUCKY_DIMON [66]

I believe it’s 18 because you find 5 then another 4 which is 9 and you guys already had 9, 9 plus 9 equal 18

3 0

3 years ago

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Currently doing a semester exam- and i need help

xeze [42]

Oh my god I’m sorry for answering ur question but please don’t be exam or test , brainly will delete ur question because apparently it’s violating the terms of service , but much love I hope u pass <3

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3 years ago

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49 - 28= 51 -32= 23x 7 = 14 x 5 =

Viefleur [7K]

49-28=21
51-32=19
23x7=161
14x5=70

3 0

3 years ago

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Which methods correctly solve for the variable x in the equation 7 - x =18?​

Which methods correctly solve for the variable x in the equation 7 - x =18?