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White raven [17]
2 years ago
14

Two times a number is at least 16. Inequality

Mathematics
1 answer:
kati45 [8]2 years ago
6 0

Answer:

3x - 16 <= 8

Step-by-step explanation:

The key is to translate this problem, one step at a time:

Write an inequality

This tells us that we'll use >, <, ≥, or ≤ instead of = when describing the two sides of the equation.

that represents five less than

This tells us that we need to take away, or subtract 5: –5

two times a number

We don't know the number, so let's call it x. Two times x is 2x.

Then, the previous step tells us we want five less than twice the number, so we say 2x –5.

that is at least fifteen

"At least fifteen" tells us the first part of the equation can be greater than or equal to 15, which means we need the ≥ sign. If the phrase said "greater than fifteen," we'd use >.

Putting it all together, we get 2x – 5 ≥ 15.

then solve the inequality

We undo everything the algebra did to x to solve in the reverse order.

2x – 5 ≥ 15 First, undo the subtraction by adding 5 to both sides.

2x ≥ 20  Next, divide both sides by 2.

x ≥ 10.   We see that x has to be greater than or equal to 10. This means we could pick any number, 10 or greater, and plug it back into the equation we constructed to check our answer.

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Answer:

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Step-by-step explanation: 6.45 times three equals 19.35 plus a quarter of 6.45 equals 1.6125 which you round to 1.61. So 19.35+1.61= 20.96

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3 years ago
What is the y-intercept of the function f(x)=4 - 5x? (Hint: use the commutative property)
Tom [10]

Answer:

Therefore the y-intercept of the function is 4.

Step-by-step explanation:

Intercepts:

The line which intersect on x-axis and y-axis are called intercepts.

y-intercept: The line or function which intersect at y-axis. So when the line intersect at y-axis, X coordinate is zero.

So in the given Function Put x = 0 we will get the y-intercept

f(x)= 4-5x

Put x =0

f(0)= 4-5\times 0

f(0)= 4-0=4

Therefore the y-intercept of the function is 4.

7 0
3 years ago
A passenger car weighs 4.5 times 10 Superscript 3 units. Which unit of measure was used?
Pepsi [2]
20? I’m not for sure maybe look in the book? That’s the answer I got and it was right
5 1
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Marrrta [24]

Answer:

Step-by-step explanation:

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Answer:

C)

Step-by-step explanation:

g has to be less than 7.2

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