4 years ago

If x=4, calculate the value of: x2 +2x

Mathematics

2 answers:

zlopas [31]4 years ago

6 0

If x = 4

x² + 2x = 24

Substitute x by its value

4² + 2(4)
16 + 8 = 24

Veronika [31]4 years ago

4 0

We simply need to plug in x = 4 into x² + 2x

So plugging in x = 4, we get:

4² + 2(4)

Simplifying it, we get:

16 + 2(4)
16 + 8
24

When x = 4, x² + 2x will equal 24.

You might be interested in

What would this be after you simplify?<br><br> x^0 y^5<br> -----------<br> y^5 z^-7

Kay [80]

Answer:

y^5 z^7

______

y^5

3 0

3 years ago

An ice cream machine produced 52 ice creams per minute. After reconditioning, its speed increased to 65 ice creams per minute. B

Anastasy [175]

Answer:25 %

Step-by-step explanation:

Given

Earlier machine was producing 52 ice cream per minute and

Now it is Producing 65 ice creams per minute

So percentage increase of the machine $=\frac{\text{final-Initial}}{\text{Initial}}\times 100$

$=\frac{65-52}{52}\times 100$

$=\frac{13}{52}\times 100$

$=\frac{1}{4}\times 100=25\ \%$

So there is increase of 25 % in speed

5 0

3 years ago

Brianna has 4 pink bracelets . One third of all her bracelets are pink. How many bracelets does Brianna have?

HACTEHA [7]

4/x=1/3 Cross multiply.
X=12 12 bracelets.

3 0

3 years ago

Buy recycling 1 ton of paper 6953 gallons of water are saved how many gallons are water are saved by recycling 4 tons of paper

9966 [12]

27812 gals because you would have to multiply 6953 and 4

8 0

3 years ago

Find the equation of this line.

9966 [12]

y=3/4x+1/4

I hope this helped :)

3 0

2 years ago

Read 2 more answers