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Gemiola [76]
3 years ago
14

Y varies directly with x, and y = 7 when x = 2. What is the value of x when y = 21?

Mathematics
1 answer:
Hoochie [10]3 years ago
3 0
16 the answer is 16 
7 is 5more than to see 2 plus 5 = 7 so 21 - 5 =16 GENIUS :3
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Use the commutative and associative properties of multiplication to write an expression equivalent to (4⋅5)⋅3.
Darina [25.2K]
Commutaive property says
ab=ba or expanded to say
abc=cba

associative peropty =
a(bc)=(ab)c

so using that
first mix them up knowing that we can move the parenthaseese
all possible equivelnt ones are
4*(5*3)
(3*5)*4
3*(5*4)
(3*4)*5
3*(4*5)
 
4 0
3 years ago
Factorise mx+cx+my+cy<br> With steps!!!<br> x=algebra x
avanturin [10]

Step-by-step explanation:

Hey there!

While factorising you remember to make it take common in most of the expression.

Here;

=mx+cx+my+cy

Take common 'x' in "mx+cx" and 'y' in my + cy.

= x(m+c) + y(m+c)

Now, "(m+c)" common again.

= (m+c) (x+y)

Therefore the factorized form of the expression in (m+c)(x+y).

<u>Hope it helps</u><u>.</u><u>.</u><u>.</u>

6 0
3 years ago
Read 2 more answers
Solve -5/3x + 7/3 = -5
Pavlova-9 [17]

Answer:

x = 24/15 = 8/3 = 2 2/3

Step-by-step explanation:

remember what you do to the left you must do to the right.

I converted the -5 to -15/3 so I could easily add or subtract

-5/3 x = -8/3

multiply both sides by -3/5 to cancel the coefficient of the x

x = -8/3 * -3/5 = 24/15

3 0
3 years ago
Cual es el valor de la expression<br>7×3²+3×7+6​
Julli [10]

Answer:

90

Step-by-step explanation:

7 x (3x3) + (3x7) +6

(7 x 9) + 21+6

63 + 21 + 6

        90

3 0
3 years ago
Can someone please tell me if this is correct if it’s not can u tell me what’s the correct answer
bearhunter [10]

Answer:

2. option D and 3. option A

Step-by-step explanation:

2. 7 + y = 30

<u>7 - 7</u> + y = <u>30 - 7</u>

y = 23

3. w - 32 = 55

w <u>-</u><u> </u><u>32</u><u> </u><u>+</u><u> </u><u>32</u> = <u>55</u><u> </u><u>-</u><u> </u><u>32</u>

w = 87

Basically the answers you choose are right. Hope this helps, thank you :) !!

8 0
3 years ago
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