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ruslelena [56]
3 years ago
12

What expression is equivalent to 5 (x+6)-2x+9.

Mathematics
1 answer:
myrzilka [38]3 years ago
7 0
5x+30- 2x+9

3x+39 is the expression.
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Write an equation for the line perpendicular to 4x - 12y = 2 and passing through point (10, -1)
MrMuchimi

Answer:

3x+y=-31

Step-by-step explanation:

4x - 12y = 2\\12y = 4x-2\\y=\frac{x}{3}-\frac{1}{6}

Slope of perpendicular line is -3.

y=-3x+b

Sub in the point (10, -1)

-1=-3(10)+b\\-1=30+b\\b=-31\\y=-3x-31\\3x+y=-31

8 0
3 years ago
Solve for x in the equation x 2 - 4 x - 9 = 29.
Marizza181 [45]

Answer:

x= -19

Step-by-step explanation:

2x-4x-9=29

-2x=29+9

x=38/-2

= -19

5 0
3 years ago
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Juan has 24 marbles and 6 bags Write a number sentence that shows how many marbles he can put in each bag if he puts the same nu
I am Lyosha [343]
24 divided by 6=3 is the answer
7 0
3 years ago
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Find the volume of the square pyramid showing. round to the nearest 10th if necessary
solong [7]
The volume of a square pyramid is (1/3)(area of base)(height of pyramid).

Here the area of the base is (10 ft)^2 = 100 ft^2.

13 ft is the height of one of the triangular sides, but not the height of the pyramid.  To find the latter, draw another triangle whose upper vertex is connected to the middle of one of the four equal sides of the base by a diagonal of length 13 ft.  That "middle" is 5 units straight down from the upper vertex.  Thus, you have a triangle with known hypotenuse (13 ft) and known opposite side 5 feet (half of 10 ft).  What is the height of the pyramid?  
To find this, use the Pyth. Thm.:  (5 ft)^2 + y^2 = (13 ft)^2.  y = 12 ft.

Then the vol. of the pyramid is (1/3)(area of base)(height of pyramid) =
(1/3)(100 ft^2)(12 ft) = 400 ft^3 (answer)
5 0
3 years ago
Whitney rode her skateboard at a constant speed. She rode 1 mile in 10 minutes. Which of these equations represents the amount o
Zigmanuir [339]

Answer:

C. t = 10d

Example:

If i rode the bike for 3 miles then

t = 10(3)

Then,

t = 30

So, the bike was rode for 30 minutes

3 0
3 years ago
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