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3 years ago

Ax - 8 = x + 2 If x = 2 on the equation above, what is the value of a?

Mathematics

2 answers:

Lerok [7]3 years ago

7 0

The value of a is 6

Explanation:
6*2-8 = 2+2

aev [14]3 years ago

6 0

Answer:

a=2

Step-by-step explanation:

ax-8=x+2

when x=2

2a-8=2+2

2a=4+8

2a=12

a=12/2=6

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Given that sin x = cos 2x find the value of x

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Answer:

The most straightforward way to obtain the expression for cos(2x) is by using the "cosine of the sum" formula: cos(x + y) = cosx*cosy - sinx*siny. cos(2x) = cos² (x) - (1 - cos²(x)) = 2cos²(x) - 1. = 2cos²(x) - 1.

Step-by-step explanation:

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2 years ago

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3 years ago

may someone help me ASAP? I am solving polynomial equations and I don't know how to do it, here is the equation... x^4+11x^2=3x^

koban [17]

Answer:

$x=2\sqrt{2}$ , $x=-2\sqrt{2}$ , $x=4i$ , $x=-4i$

Step-by-step explanation:

$x^4+11x^2=3x^2+128$

First, we subtract 128 from both sides:

$x^4+11x^2-128=3x^2$

Then, we subtract $3x^2$ from both sides:

$x^4+8x^2-128=0$

Rewrite the equation:

$u^2+8u-128=0$

Insert and solve:

$u^2+8u-128=0\\u=8,u=-16\\x^2=8:x=2\sqrt{2},x= -2\sqrt{2} \\x^2=-16:x=4i,x=-4i$

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3 years ago

What is the volume in cubic centimeters of a cube that measures 13 cm wide

Andrei [34K]

Answer:

2197 cubic centimeters

Step-by-step explanation:

13^3=2197

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3 years ago

jen and sarah go to lunch at the Green Grill.Their meals total $28.00 .The tax is 6%.What is the total cost including tax?

nordsb [41]

6%=0.06

28(0.06)
= 1.68 ---> tax

28+1.68
= 29.68

Jen and Sarah spent 29.68 dollars including tax

I hope this answer helped you and have a wonderful day!

5 0

3 years ago

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