All categories

3 years ago

What is the correct evaluation of 4x2 - 2x + 5, when x is equal to 2?

Mathematics

1 answer:

meriva3 years ago

3 0

Answer:

Step-by-step explanation:

Rewrite the problem

4x2-2(2)+5

2. Solve the problem. Do the multiplication first and then the subtraction and addition

8-2(2)+5

8-4+5

4+5

The final answer is 9

You might be interested in

Solve the given equation

Salsk061 [2.6K]

The answer is R=0.053707443....
Round to the nearest decimal place as it asks for
i hope this helps :)

5 0

3 years ago

What is the best estimate for this sum 1/8+1/6=The sum will be close to?

tamaranim1 [39]

The expression given is

$\frac{1}{8}+\frac{1}{6}$

The sum of the expression will be,

$\frac{1}{8}+\frac{1}{6}=\frac{6+8}{48}=\frac{14}{48}=\frac{7}{24}$

The sum will be

$\frac{7}{24}$

8 0

1 year ago

Solve the following system of equations: y = 5/4x - 2 y = -1/4x + 19 x = ? and y = ?

Dmitry [639]

Answer:

1. y= 5 /4 x −2

2.x=−4y+76

4 0

3 years ago

Read 2 more answers

What is the sum of 6dm, 40mm, 2m and 10cm in meters?

sveticcg [70]

Answer:

Step-by-step explanation:

convert to meters

6 dm = 0.6 m

40 mm = 0.04 m

2 m = 2 m

10 cm = 0.1 m

sum

0.6 + 0.04 + 2 + 0.1 =

2.74 m

7 0

2 years ago

Read 2 more answers

If I can paint a wall in 20 min and my friend can paint a wall in 30 min. How many minutes would it take for us to paint a wall

ra1l [238]

Answer: $12\ \text{min}$

Step-by-step explanation:

Given

It takes 20 min and 30 min for a person and his friend to paint a wall individually i.e.

In 1 min they cover $\frac{1}{20}$ part and $\frac{1}{30}$ part of wall respectively.

If the work together, 1 minute work is

$\Rightarrow \dfrac{1}{20}+\dfrac{1}{30}\\\\\Rightarrow \dfrac{3+2}{60}\\\\\Rightarrow \dfrac{5}{60}$

Time required will be reciprocal of it

$\Rightarrow \dfrac{60}{5}=12\ \text{min}$

3 0

3 years ago