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GrogVix [38]
3 years ago
10

Literally how do i do this

Mathematics
1 answer:
Studentka2010 [4]3 years ago
7 0

Answer:

rewrite one side using the distributive property. the equations are equivalent

Step-by-step explanation:

with 3(x+2), 3 can be distributed. all terms inside the parenthesis are multiplied by 3. the equation turns into 3x+6=18, which is the same as equation a. therefore, the equations are equivalent

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Answer quick 146-59 PLS​
tatyana61 [14]

Answer:

146 minus 59? equals 87 :)

4 0
3 years ago
Can someone help me with this?
yan [13]
I'm assuming you want the total surface area.

This is a trapezoidal prism. The bases are the parallel faces running horizontal (parallel to the ground) and they are congruent trapezoids. The lateral sides are rectangles.

-------------------------------------------------

Lateral Faces:
The back face (hidden from view) is a rectangle that is 12 inches by 3 inches, so it has an area of 12*3 = 36 sq inches

The front slant faces on the left and right are each 3*5 = 15 sq inches in area

The front center lateral face has area of 6*3 = 18 sq inches

The total lateral surface area is 15+18+15+36 = 84 sq inches

-------------------------------------------------

The bases are each the same trapezoid. The trapezoid has two parallel sides of 12 and 6 inches. Call this b1 and b2. The height of the trapezoid is h = 4. Imagine the trapezoid is laid flat in a 2D perspective instead of a 3D one.

The area of one trapezoid is...
A = h*(b1+b2)/2
A = 4*(12+6)/2
A = 4*(18)/2
A = 72/2
A = 36

So the area of both base faces combined is 2*36 = 72

-------------------------------------------------

The total surface area is then found by adding the total lateral surface area (84) and the total base area (72) to get 84+72 = 156

Final Answer: 156 square inches

4 0
3 years ago
How do you find the equation that is perpendicular to 2x-5y=20, passing through the point (7,-8)?
IrinaK [193]
To find a perpendicular line you first need to see the equation in slope intercept form. To do that you need to solve for y. 

2x - 5y = 20 ---> subtract 2x from both sides
-5y = -2x + 20 ---> divide by -5
y = 2/5x - 4

Now that you have this, note that a perpendicular line has opposite and reciprocal slope. Since the slope in our equation is 2/5, that means the new line will have -5/2 slope. So we use the point given and the slope to find the y intercept. 

y = mx + b
-8 = -5/2(7) + b ---> multiply
-8 = -35/2 + b ---> add 35/2 to both sides
19/2 = b

Now use our new slope and new y intercept to write the new equation. 

y = -5/2x + 19/2
8 0
3 years ago
An athlete eats 0.4kg of protein per week while training. How much protein will she eat during 6 weeks of training?
kolezko [41]
0.4kg  per week.     so 0.4kg  x  6 weeks is 2.4kgs
7 0
3 years ago
Solve the inequality.<br>4(x – 7)&gt;-8<br>​
frez [133]

Answer:

x>5

Step-by-step explanation:

1. First, you do distributive property with 4(x-7), which is 4x-28

2. Add 28 to both sides

3. divide 4 on each side

4. 20 divided by 4 is 5

6. x>5

6 0
4 years ago
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