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3 years ago

What is the value of x in the equation 8x – 2y = 48, when y = 4?

Mathematics

2 answers:

LiRa [457]3 years ago

8 0

Answer:

x=7

Step-by-step explanation:

8x – 2y = 48

Let y=4

8x - 2(4) = 48

8x - 8 = 48

Add 8 to each side

8x -8+8 = 48+8

8x = 56

Divide each side by 8

8x/8 = 56/8

x = 7

morpeh [17]3 years ago

4 0

Answer:

x = 7

Step-by-step explanation:

since we know y = 4, we can plug this into the equation to find x

8x - 2y = 48

8x - 2(4) = 48

8x - 8 = 48

8x = 56

x = 7

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Find the LCM of k^2 + 3k + 2 and 2k^2 + 14k + 20.

Airida [17]

Answer:

C. 2(k +2)(k +5)(k +1)

Step-by-step explanation:

The LCM will be the product of unique factors.

$(k^2 + 3k + 2)=(k+1)(k+2)\\(2k^2 + 14k + 20)=2(k+2)(k+5)$

The unique factors are 2, (k+1), (k+2), (k+5), so the LCM is their product:

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3 years ago

Jasim has invested 600 dinars in a business at the rate of 4 % for 3 years. Find his

Marat540 [252]

Answer:

1) Simple interest is 72 dinars

2) Total amount after 3 years is 672 dinars.

Step-by-step explanation:

Principal Amount P = 600 dinars

Interest Rate= 4% = 0.04

Time = 3 years

i) Simple Interest

The formula used to calculate interest is $I=P\times r \times t$

Putting values and finding interest

$I=P\times r \times t\\I=600\times 0.04 \times 3\\I=72$

So, simple interest is 72 dinars

ii) Total amount after 3 years

The formula to calculate total amount is: $A=P(1+rt)$

Putting values and finding future amount A

$A=P(1+rt)\\A=600(1+(0.04*3))\\A=600(1+0.12)\\A=600(1.12)\\A=672$

So, Total amount after 3 years is 672 dinars.

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