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ioda
3 years ago
6

A plant is 20 inches tall. If the plant grows 2h inches each week for the next 4 weeks, and h inches for each of the 2 weeks aft

er that, which expression shows the height of the plant in inches after 6 weeks? A) 20 + 10h B) 20 - 10h C) 20 - 2h D) 20 + h
Please give a simple and clear answer.
Mathematics
2 answers:
iVinArrow [24]3 years ago
8 0

Answer:

Option A is correct

20+10h

Step-by-step explanation:

As per the statement:

A plant is 20 inches tall.

It is also given that:

If the plant grows 2h inches each week for the next 4 weeks,

⇒(2h) \cdot 4 = 8h

and

h inches for each of the 2 weeks .

⇒(h) \cdot 2 = 2h

Then,  every 2 weeks after that, another 2h.

⇒ in 6 weeks, a total of 10h inches height of the plant grows

We have to find the expression shows the height of the plant in inches after 6 weeks.

Initially, a plant is 20 inches tall.

in 6 week,  a total of 10h inches height of the plant grows

⇒the height of the plant in inches after 6 weeks = 20 + 10h

Therefore, the expression shows the height of the plant in inches after 6 weeks is, 20+ 10h

FromTheMoon [43]3 years ago
3 0
A) 20+10h

You know that you have 20 inches to start with, then it will grow 2h four times, or 8h total. Then it will grow h 2 times, or 2h. You add the 20, 8h, and 2h, to get 20+10h.

Hope this helps!
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I need to find the answer for "x" 2x + 3(5x - 7) =47
nordsb [41]

Answer:

The answer would be x=4.  

Step-by-step explanation: Step 1: Simplify both sides of the equation.

2x+3(5x−7)=47

2x+(3)(5x)+(3)(−7)=47(Distribute)

2x+15x+−21=47

(2x+15x)+(−21)=47(Combine Like Terms)

17x+−21=47

17x−21=47

Step 2: Add 21 to both sides.

17x−21+21=47+21

17x=68

Step 3: Divide both sides by 17.

17x/17=68

17x=68

x=4

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2 years ago
Half a pepperoni pizza plus three fourths of a ham and pineapple pizza contains 765 calories 1/4 of a pepperoni pizza plus a who
yulyashka [42]

Answer:

Correct choice is D (In a whole pepperoni pizza are 660 calories, in  in a whole ham and pineapple pizza are 580 calories).

Step-by-step explanation:

Let x calories be the number of calories a whole pepperoni pizza contains and y calories be the number of calories a whole ham and pineapple pizza contains.

1. If half a pepperoni pizza plus three fourths of a ham and pineapple pizza contains 765 calories, then

\dfrac{1}{2}x+\dfrac{3}{4}y=765.

2. If 1/4 of a pepperoni pizza plus a whole ham and pineapple pizza contains 745 calories. then

\dfrac{1}{4}x+y=745.

3. Multiply each equation by 4 and get a system of two equations:

\left\{\begin{array}{l}2x+3y=3060\\x+4y=2980\end{array}\right.

From the second equation x=2980-4y, then

2(2980-4y)+3y=3060,\\ \\5960-8y+3y=3060,\\ \\-8y+3y=3060-5960,\\ \\-5y=-2900,\\ \\y=580.

Then

x=2980-4\cdot 580=2980-2320=660.

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