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3 years ago

What the value of x 4(2x-5)=5x+4

Mathematics

2 answers:

mrs_skeptik [129]3 years ago

7 0

x=8

hope this helps you

ddd [48]3 years ago

3 0

First you would distribute the 4 on the left side of the equal sign,

8x-20=5x+4.

You would then combine like terms by adding 20 to both sides,

8x=5x+24

You would then subtract 5x from both sides,

3x=24

Finally, you would divide 24 by 3.

24/3=8

8=x

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Consider the function f(x)=-3x^2 +7x -k. [3 Marks] a) For what values of k will the function have no zeros? b) For what values o

Anna35 [415]

Answer: a) k >4.08

b) k = 4.08

c) k<4.08

Step-by-step explanation:

Since we have given that

$f(x)=-3x^2+7x-k$

a) For what values of k will the function have no zeros?

It mean it has no real zeroes i.e. Discriminant < 0

As we know that

$D=b^2-4ac$

Here, a =-3

b = 7

c = -k

So, it becomes,

$D$

b) For what values of k will the function have one zero?

It means it has one real root i.e equal roots.

So, in this case, D = 0

So, it becomes,

$D=b^2-4ac=0\\\\D=7^2-4\times -3\times -k=0\\\\49-12k=0\\\\49=12k\\\\k=\dfrac{49}{12}\\\\k=4.08$

c) For what values of k will the function have two zeros?

It means it has two real roots.

In this case, D>0

So, it becomes,

$D=7^2-4\times -3\times -k>0\\\\49-12k>0\\\\-12k>-49\\\\12k$

Hence, a) k >4.08

b) k = 4.08

c) k<4.08

3 0

3 years ago

PLEASE HELP GIVING BRAINLIEST MUCH APPRECIATED

Colt1911 [192]

Answer:

Step-by-step explanation:

we need to subtract half of the area of the circle from the area of the square to get the area of the shape on the picture.

Therefore a²-πb²/2 is the correct answer

hiii I'm new plzz márk as brainliest

3 0

2 years ago

EASY POINTS!!!

Anika [276]

Simplify
10x - 4x = 36
6x = 36
Divide by 6

Solution: x = 6

8 0

3 years ago

Read 2 more answers

Find the domain of f/g

san4es73 [151]

Answer:

C. All real numbers except 3/4

Step-by-step explanation:

We are given

$f(x)=3x^2+x^4+2$

$g(x)=4x-3$

Firstly, we will find f/g

$\frac{f}{g}=\frac{3x^2+x^4+2}{4x-3}$

Domain:

We know that domain is all possible values of x for which any function is defined

so, we know that denominator of any function can not be zero

so, firstly we set denominator =0

and then we can solve for x

$4x-3=0$

Add both sides by 3

$4x-3+3=0+3$

$4x=3$

$x=\frac{3}{4}$

so, this function is defined for all values of x except at

$x=\frac{3}{4}$

Domain will be

All real numbers except 3/4

5 0

4 years ago

Need answer asap evaluate the limit or state that the limit does not exist 7n-8n/2n

bagirrra123 [75]

$\lim_{n \to \ 0 } \frac{7n-8n}{2n} = \lim_{n \to \ 0 } \frac{-n}{2n} 
= \lim_{n \to \ 0 } \frac{-1}{2} = \frac{-1}{2}$

4 0

3 years ago