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worty [1.4K]
2 years ago
8

F 7x = 42, find the value of 44 - 8x​

Mathematics
1 answer:
Pie2 years ago
3 0
The value is -4.
7x=42
/7 /7 (Divide both sides by 7)
x=6
If we insert x=6 into 44-8x, it is 44-8(6), which is 44-48.
44-48=-4, so the answer is -4.
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Write the 5th term in the expansion of (5x-y/2)^7
Nezavi [6.7K]

Answer:

65625/4(x^5)(y²)

Step-by-step explanation:

Using binomial expansion

Formula: (n k) (a^k)(b ^(n-k))

Where (n k) represents n combination of k (nCk)

From the question k = 5 (i.e. 5th term)

n = 7 (power of expression)

a = 5x

b = -y/2

....................

Solving nCk

n = 7

k = 5

nCk = 7C5

= 7!/(5!2!) ------ Expand Expression

=7 * 6 * 5! /(5! * 2*1)

= 7*6/2

= 21 ------

.........................

Solving (a^k) (b^(n-k))

a = 5x

b = -y/2

k = 5

n = 7

Substituting these values in the expression

(5x)^5 * (-y/2)^(7-5)

= (3125x^5) * (-y/2)²

= 3125x^5 * y²/4

= (3125x^5)(y²)/4

------------------------------------

Multiplying the two expression above

21 * (3125x^5)(y²)/4

= 65625/4(x^5)(y²)

5 0
2 years ago
What is the solution to the equation below? 6x=2x+24
Margaret [11]

Answer:

x=6

Step-by-step explanation:

First, we combine like terms.

6x=2x+24

6x-2x=24

4x=24

Then we divide both sides by 4.

x=6

7 0
3 years ago
Read 2 more answers
6.2 + 4/5 = ? .........
LUCKY_DIMON [66]

Answer:

7, .2=2/10=1/5+4/5=1+6=7.

P.s.

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4 0
3 years ago
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Help me answer correctly !!!! Will mark Brianliest !!!!!!!!!!!!!!!!
mrs_skeptik [129]
Show the question so I can answer it for you.
6 0
3 years ago
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If five times of a number is 125 then 0•8 of this number is​
Nady [450]

Answer:

20

Step-by-step explanation:

5n = 125

n = 25

0.8 x 25 = 20

5 0
3 years ago
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