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stepan [7]
3 years ago
13

7x+8(x+1/4)=3(6x-9)-8 need a solution for this problem

Mathematics
1 answer:
Misha Larkins [42]3 years ago
6 0
Remember to do the same thing to both sides

use distributive prpoerty which is
a(b+c)=ab+ac so
pemdas
multiplication
8(x+1/4)=8x+8/4=8x+2
3(6x-9)=18x-27

now we have7x+8x+2=18x-27-8
add like terms
15x+2=18x-35
subtract 15x from both sides
2=3x-35
add 35 to both sides
37=3x
divide both sides by 3
37/3=x
12 and 1/3=x

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Factoring math/////////
damaskus [11]

Answer:

Step-by-step explanation:

If you want to factor this, you have to use the quadratic formula to do so.

x=\frac{-b+/-\sqrt{b^2-4ac} }{2a}

For us, it looks like this:

x=\frac{-3+/-\sqrt{(-3)^2-4(5)(4)} }{2(5)}

which simplifies to

x=\frac{-3+/-\sqrt{-71} }{10}

Since it breaks every mathematical rule to have a negative number under an even index radical, we have to deal with that using the imaginary "i".  You should know at this point that i^2=-1

so we will do a rewrite on that equation above:

x=\frac{-3+/-\sqrt{i^2*71} }{10}

which simplifies further to

x=\frac{-3+/-i\sqrt{71} }{10}

This is the answer but we can separate it into its proper standard form which is

x=-\frac{3}{10}+\frac{\sqrt{71} }{10}i and x=-\frac{3}{10}-\frac{\sqrt{71} }{10}i

8 0
3 years ago
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Find the value of x and y in the parallelogram
anyanavicka [17]

Answer:

x = 26, y = 11

Step-by-step explanation:

opposite sides are equal

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Work out the angle of x
Amiraneli [1.4K]

Answer:

a)

Cos60=1/2=0.5

b)

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2 years ago
What should be added to both sides of this equation to solve for the variable? r + (-12) = 19
Slav-nsk [51]

Answer:

12

Step-by-step explanation:

Then the -12 and +12 will cancel out, so you're left with a clean isolated r on the left:

r -12 +12 = 19 + 12

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I need a. Correct answer I will mark brainliest
Otrada [13]

Answer:

Option (A)

Step-by-step explanation:

By satisfying the equation of a function 'f' by each coordinates given in the options we can get the point which lies on the graph of f(x) = 2\times (5)^x

Option (A). (1, 10)

f(1) = 2\times (5)^1

10 = 10

True.

Therefore, point (1, 10) lies on the graph.

Option (B). (0, 10)

f(0) = 2\times 5^0

10 = 2

Not true.

Therefore, point (0, 10) doesn't lie on the graph.

Option (C). (10, 1)

f(10) = 2\times 5^{10}

1 = 19531250

Not true.

Therefore, point (10, 1) doesn't lie on the graph.

Option (D). (0, 0)

f(0) = 2\times 5^0

0 = 2

Not True.

Point (0, 0) doesn't lie on the graph.

Option (A) will be the answer.

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