Ask question

Ask question

All categories

3 years ago

14

If x=4 canculate the value of x2 + 2x

2 answers:

alexandr402 [8]3 years ago

6 0

If u check your answer on google ithink u can get

polet [3.4K]3 years ago

4 0

Answer:

24

Step-by-step explanation:

x^2+2x=4^2+2(4)=16+8=24

You might be interested in

Explain how an estimate helps you place the decimal point when multiplying 3.9 × 5.3

Elza [17]

So you can round 3.9 to 4, and 5.3 to 5. so 4x5=20. there would then be 2 digits in front of the decimal point. (:

5 0

3 years ago

Lucy had math and reading homework tonight. Lucy can solve each math problem in 5 minutes and she can read each page in 2.5 minu

drek231 [11]

Answer:

$x=18,y=6$ , graph is there for reference.

Step-by-step explanation:

Given,

$x$ is the number of math problem Lucy solved.

$y$ is the number of pages she read.

She can do each math problem in $5$ minutes, therefore she can solve $x$ number of questions into $5 \times x=5x$ minutes.

She can read each page in $2.5$ minutes, therefore she can read $y$ pages in 2.5y minutes.

As per given detail,

$5x+2.5y=105$ equation 1.

And,

It is given that number of math problems Lucy solved is 3 times the number of pages she read.

$x=3y$ equation 2.

We need to find $x$ and $y$ intercept of each of the equation to graph them.

For $x-intercept$ put y=0

We will get $x=\frac{105}{5} =21$

Thus the point is $(21,0)$

Let us find $y-intercept$ by assuming $x=0$

we get $y=\frac{105}{2.5} =42$

Thus the point is $(42,0)$

Join these two points.

Similarly considering the other equation $x=3y$

Here x-intercept would be at $y=0$

We will get $x=0$

Thus the point is $(0,0)$

Let us assume on more point, say $x=30$ , we get $y=10$

Thus the point is $(30,10)$

Join these two points.

We will get a point of intersection at $(18,6)$

Thus $x=18$ and $y=6$

8 0

4 years ago

Hurry I need helpppp will give brainliest

jarptica [38.1K]

Answer:

c

Step-by-step explanation:

8 0

3 years ago

If g(x)=x^2-2x+1 were shifted 2 units to the left, what would be the new equation, h(x)?

Luda [366]

Answer:

h(x) = (x+2) ^2 -2x -3

Step-by-step explanation:

If we have to shift 2 units left the we have to replace x by x+2 i.e

h(x) = (x+2)^2-2(x+2)+1

= (x+2)^2 -2x-4 +1

= (x+2)^2 -2x -3

7 0

3 years ago

Find the length of the third side. If necessary,write in simplest radical form.

mojhsa [17]

Answer:

4

Step-by-step explanation:

It’s a right triangle.

$a^{2} +b^{2} =c^{2}$

$10^{2} +x^{2} =(2\sqrt{29} ) ^{2}$

100+x^2=4(29)

16=x^2

x=4

8 0

3 years ago