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3 years ago

Evaluate 4b-a when a=12 and b=7

Mathematics

2 answers:

ANTONII [103]3 years ago

7 0

Answer:

4b - a = 15

Step-by-step explanation:

Ilia_Sergeevich [38]3 years ago

4 0

Answer:

4b - a = 15

Step-by-step explanation:

if you replace the variables with their equivalent counterparts you get the equation 4(7) - 12 = __ when you do the math make sure to do the parentheses first then subtract, just like in elementary school remember pemdas parentheses, exponents, multiplication, division, addition, subtraction. I hope this helps.

good luck:)

Brainliestttt Plssssssss:)

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teacher asked her students write down the number of hours studied rounded to the nearest half hour. she complies the results in

Whitepunk [10]

Answer:

1.5

Step-by-step explanation:

The question is incomplete due to the probability distribution table, investigating you can find it so I will attach it.

Having the table, we need to find the mean of the probability distribution, which is defined as the sum of the product of probability and value of random distribution, that is:

M = Sum (xi) * P (xi)

We replace:

M = 0.5 * 0.07 + 1 * 0.2 + 1.5 * 0.46 + 2 * 0.2 + 2.5 * 0.07

M = 1.5

Therefore, the mean of the given table is 1.5

8 0

3 years ago

This is a substitution problem

mrs_skeptik [129]

They consists of equations and unknown variables. There are 4 PCs and 8 Mac in the room

<h3>System of equation</h3>

They consists of equations and unknown variables

Let the number of PCs be x

Let the number of Mac be y

If Mke has 12 computers, then;

x + y = 12

If there are two Macs for every PC in his classroom, then;

y = 2x

Substitute

x + 2x = 12

3x = 12

x = 4

Recall y = 2x

y = 2(4)

y = 8

There are 4 PCs and 8 Mac in the room

Learn more on system of equations here; brainly.com/question/14323743

#SPJ2

6 0

2 years ago

Read 2 more answers

What is the solution of x+4/2x-1<0

Vikentia [17]

Answer:

$\large\boxed{ -4$

Step-by-step explanation:

$Domain:\ 2x-1\neq0\to x\neq\dfrac{1}{2}$

$\dfrac{x+4}{2x-1}$

$(x+4)(2x-1)=(x)(2x)+....=2x^2+...\to 2>0\\\\\text{therefore the parabola is op}\text{en up}$

$\text{Look at the picture.}$

$\dfrac{x+4}{2x-1}$

3 0

3 years ago

Read 2 more answers

The functions f and g are defined as follows f(x)=5x+3/6x+7 and g(x)= square root sign x^2-4x

telo118 [61]

<span>f(x)=5x+3/6x+7

This means that f(6/x) = [</span>5(6/x)+3] / [6(6/x)+7] = [ 30/x +3 ] / [36/x +7]

If we assume x≠0 , f(6/x) = [30 +3x]/ [36 + 7x]

g(x)=√<span> [ x^2-4x ]
</span>
g(x-4) = √ [ (x-4)^2-4(x-4) ] = √ [ x² -8x +16 -4x +16 ] = √ [ x^2-12x +32]

3 0

3 years ago

What’s the answer ??? ( someone please help )

Fofino [41]

It would probably be B because it said between -30 and 130

3 0

3 years ago