Step-by-step explanation:it says from which means x-axis, (2,-7) moved left and right is (-5,-7) and "x-axis" as well bc the second option for the x coordinate is -7 that take 9 moves and not 7

8 0

3 years ago

The length of a rectangle is 3cm greater than its width. the perimeter of the rectangle is 34cm. find its length.

mamaluj [8]

Answer:

10cm

Step-by-step explanation:

The formula for perimeter is:

$P=2(l+w)$

Let the width of the rectangle be x then the length would be...

3+x

Now, let's plug these values into the equation and solve. (Note we are also given perimeter is 34 cm):

$34=2(x+3+x)\\34=2(2x+3)\\Distribute\ the\ 2\ to\ each\ term\ in\ the\ parentheses\\34=2(2x)+2(3)\\34=4x+6\\Subtract\ 6\ from\ both\ sides\\4x=28\\Divide\ both\ sides\ by\ 4\\x=7$

And since the length is x+3 then it is...

x+3=7+3=10cm

4 0

2 years ago

Read 2 more answers

Can a triangle be drawn with the following side lengths? Why or why not?<br> 2 cm, 11 cm, 8 cm

nadezda [96]

A triangle can not be drawn with these side lengths. This is because when you add 2cm+8cm, it is not more than 11 cm.

4 0

3 years ago

An isosceles triangle has a base of 4 and a height of x+3. If the area is 10, what is the value of x?

kicyunya [14]

The area of a <span>isosceles triangle:
S=(bh)/2, where b is for base (=4) and h is for height (=x+3)
We get the equation:
10=(4*(x+3))/2
10=(4x+12)/2
4x+12=20
4x=8
x=2
</span>

5 0

3 years ago