Solve the inequality 31< 3x+4

Mathematics

1 answer:

mariarad [96]2 years ago

4 0

31 < 3x+4

subtract 4 from both sides

27 < 3x

divide by 3 from both sides

9 < x

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X/5 + 1 = 10<br><br> It’s number 11

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Answer:

X = 45

Step-by-step explanation:

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johnny owes charlotte $225. He is paying her $25 per mo until he pays back all he owes. Write an equation for when y, the amount

Nikolay [14]

Ans: y = -25x+225 or f(x) = -25x+225

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3 years ago

Marco wants to take a taxi cab ride if the cost to ride is 7.00 with the cost per m is 0.25 per mile and mr. o can only spend 30

77julia77 [94]

Each ride has a fixed cost of 7 and a cost that increases proportionally to the distance travelled of 0.25 per mile. Therefore the total cost of the ride is:

$\text{ cost(x)}=0.25\cdot x+7$

Where "x" is the distance in miles. Marco can only spend 30 on his ride, therefore the cost must be less or equal to that value.

$\begin{gathered} \text{ cost(x)}\leq30 \\ 0.25\cdot x+7\leq30 \end{gathered}$

We can solve the linear equation by isolating the "x" variable on the left side.

$\begin{gathered} 0.25\cdot x\leq30-7 \\ 0.25\cdot x\leq23 \\ x\leq\frac{23}{0.25} \\ x\leq92 \end{gathered}$

Marco's travel must be shorter or equal to 92 miles.

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7 months ago

Nine more than a number is seventy nine

tigry1 [53]

Answer:

Step-by-step explanation

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3 years ago

Read 2 more answers

Helpppppppppppppppppppppppppp

ddd [48]

Answer:
The last choice is the correct one

Explanation:
We can solve this question using "difference between squares" which has the following general rule:
a^2 - b^2 = (a+b)(a-b)

For the given question:
p^4 - 16 = (p^2 - 4)(p^2 + 4)

Now, p^2 - 4 can be further factorized using difference between squares, therefore:
p^4 - 16 = (p-2)(p+2)(p^2 + 4)

Hope this helps :)

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3 years ago