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1 year ago

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(-2(x+4)+2(2x+6)

06%29" id="TexFormula1" title="( - 2( \times + 4) + 2(2 \times + 6)" alt="( - 2( \times + 4) + 2(2 \times + 6)" align="absmiddle" class="latex-formula">

1 answer:

kherson [118]1 year ago

6 0

$\begin{gathered} -2\mleft(x+4\mright)+2\mleft(2x+6\mright)=(-2x-8)+(4x+12) \\ =2x+4 \end{gathered}$

The answer is 2x+4

Is my procedure clear?

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zhenek [66]

Let number of adult tickets be a , therefore number of student ticket be a+4 .

And total cost of the tickets is 58, that is

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Distributing 2.50 on a+4

$3.50a+2.50a+10=58$

Combining like terms

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Number of adult tickets are 8 and number of students tickets are 12.

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4 years ago

A rock is thrown down with a velocity of 20 feet per second from a hot air balloon that is 220 feet above the ground. How long w

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Answer:

It takes the rock approximately 4.96 seconds to reach the ground

Step-by-step explanation:

The given parameters of the rock thrown down from the hot air balloon are;

The (initial) downward velocity with which the rock was thrown down, u = 20 feet/second

The height of the balloon when the rock was thrown down, h = 220 feet

According to the kinetic equation of motion, we have;

h = u·t + (1/2)·g·t²

Where;

h = The height of the rock when it was thrown = 220 ft.

u = The initial velocity of the rock = 20 ft./s

g = The acceleration due to gravity acting on the rock = 9.81 m/s²

t = How long it takes the rock to reach the ground

Plugging in the values gives;

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Therefore;

t = (-20 ± √(20² - 4×4.905×(-220)))/(2 × 4.905)

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3 years ago

Ms.Kitts works at a music store. Last week she sold 6 more than 3 times the number of CDs that she sold this week. Ms.Kitts sold

Murrr4er [49]

Answer: $\left \{ {{l=3t+6} \atop {l+t=110}} \right.$

Step-by-step explanation:

Let be "l" the number of CDs Ms.Kitts sold last week, and "t" the number of CDs she sold this week.

You need to remember that:

1. The word "times" indicates a multiplication.

2. The word "more" indicates addition.

Then, the sentence "Last week she sold 6 more than 3 times the number of CDs that she sold this week" can be represented with equation:

$l=3t+6$

According to the information given in the exercise, the sum of the number of CDs Ms. Kitts sold last week and this week is: 110 CDs.

Since a sum is the result an Addition, you can write the following equation:

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Therefore, the System of equations that can be used to find the number of CDs she sold last week and the number of CDs she sold this week, is:

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Answer:

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3 years ago

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Natalija [7]

Answer:

Option A.

Step-by-step explanation:

It is given that

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4 years ago

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