Which biconditional is NOT a good definition?

Mathematics

1 answer:

Hitman42 [59]4 years ago

4 0

Answer:

Step-by-step explanation:

An angle is straight if and only if it’s measure is 180.

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Solve. −1.2z− 8.2>−9.7 Drag and drop a number or symbol into each box to show the solution. <>1.25 1.5 −1.25 −1.5

Varvara68 [4.7K]

The correct answer is: x < 1.25

To solve this, we following the same steps as when solving inequalities. We just have to remember to reverse the sign if we multiply or divide by a negative number.

-1.2x - 8.2 > -9.7
-1.2x > -1.5
x < 1.25

8 0

4 years ago

Read 2 more answers

A number is doubled and then 1 is added to it. The answer is divided by 5 and then increased by 16. The final result is 18.

ipn [44]

So let's break down this sentence (Let n = unknown number):

"A number is doubled and then 1 is added to it"; Remember that double means multiplied by 2. With this sentence, we can determine that "2n + 1" is a part of the equation.
"The answer is divided by 5, and then increased by 16"; The "answer" they refer to is "2n + 1" from the prior sentence. Since this is divided by 5 and <em>then</em> added by 16, we can determine that $\frac{2n+1}{5}+16$ is a part of our equation.
"The final result is 18"; This means that the prior part of the equation is equal (=) to 18. <u>With this info, our full equation is $\frac{2n+1}{5}+16=18$ </u>

Now, let's solve our prior equation found in A. To solve for the unknown number, n, we need to isolate the variable onto 1 side of the equation. Firstly subtract both sides by 16 to cancel out the + 16 on the left side:

$\frac{2n+1}{5}=2$