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Aliun [14]
3 years ago
6

Evaluate 4(2a - b) when a = -1 and b = 5 A -48 B -28 C -12 D 32

Mathematics
1 answer:
emmainna [20.7K]3 years ago
7 0
I'd suggest you enclose -1 and 5 within brackets as shown:


4( 2[-1] - [5] ).  Do the work within parentheses FIRST:  4( -7 ).
Then multiply as indicated:  -28
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=(1,2,3,4,5,6,7,8,9,10,11,12)
kati45 [8]

Answer:

2 and 4 is overlapping :)

Step-by-step explanation:

square numbers only those two

and even numbers=2,4,6,8,10,12

:)

8 0
3 years ago
1,000
Arturiano [62]

Answer:

5

Step-by-step explanation:

7 0
3 years ago
How do you check is the equation is a extraneous solution pr not?
vampirchik [111]

We can check the equation is an extraneous solution or not by finding the solution and plugging it in the equation, to verify it.

<h3>What is the extraneous solution?</h3>

In mathematics, an extraneous solution is a solution that comes from the process of solving the problem but is not a genuine solution to the problem, such as the answer to an equation.

As we know from the definition the extraneous solution is a solution that comes from the process of solving the problem but is not a genuine solution to the problem.

Let's suppose the equation is:

\rm \sqrt{x+4} = x -2

Squaring both the sides:

x + 4 = (x - 2)²

x + 4 = x² - 4x + 4

x² -5x = 0

x = 0 or x = 5

Checking for the solution by plugging in the equation;

\rm \sqrt{5+4} = 5 -2

3 = 3

\rm \sqrt{0+4} = 0 -2

2 ≠ -2

The solution x = 0 shows extraneous solution.

Thus, we can check the equation is an extraneous solution or not by finding the solution and plugging it in the equation, to verify it.

Learn more about the extraneous solution here:

brainly.com/question/14054707

#SPJ1

6 0
2 years ago
PLZ HELP 30 POINTS ANSWER ONLY IF YOU KNOW<br><br> 15x(5xy^15)(–5x^–13 y^3)
sladkih [1.3K]

Answer:

15x(5xy15)((−5x−13)(y3))

=

−375x2y18

x13

=

−375y18

x11

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Manu had 16 pears in a basket. Sten gave him 10 more. Manu gave 8 pears to Klara. How many pears does Manu have left?
grin007 [14]

Answer:

18    i hope this helps!   :)

Step-by-step explanation:

has 16 to begin with

gets 10 more

16 + 10 = 26

gives 8 away

26 - 8 = 18

Manu has 18 pears left

3 0
3 years ago
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