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BaLLatris [955]
3 years ago
11

What is the image of (-7, -9) after a reflection over the x-axis?

Mathematics
2 answers:
miss Akunina [59]3 years ago
4 0

Answer:

(-7,9)

Step-by-step explanation:

When you flip over the x-axis, the y-value changes its sign. Vice versa.

Veseljchak [2.6K]3 years ago
3 0

\huge\boxed{\boxed{\bold{(-7, 9)}}}

\hrulefill

To reflect a point across the x-axis, multiply or divide its y coordinate by -1:

P'=(-7, -9*-1)

Multiply:

P'=\large\boxed{(-7, 9)}

<em>An image is attached showing the original point (</em>P<em>) and its image (</em>P'<em>).</em>

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mars1129 [50]
Well with a slope of 1 it rules out a. and c. and with a y-intercept of +4 it rules out b. so the answer is d. y = x + 4
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3 years ago
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Vinvika [58]

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Step-by-step explanation:

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3 years ago
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The weight of a radioactive isotope was 96 grams at the start of an experiment. After one hour, the weight of the isotope was ha
zimovet [89]
The starting weight of the radioactive isotope = 96 grams

Weight after one hour is half of the starting weight. So the weight of the radioactive isotope after 1 hour = 48 grams

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This means, after every hour the weight is being halved. The half life of radioactive isotope is one hour.

Since after every hour, the weight is being halved, the weight of the isotope can be modeled by an exponential equation.

So,

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The general equation of the sequence will be:

\\  \\ W_{t}=96(0.5)^{t}

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We can plot the sequence using the above equation. The graph is attached below.

3 0
3 years ago
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If your starting salary is $50,000 and you receive a 4%increase at the end of every year, what is the total amount, indollars, y
Softa [21]
Answer

Total amount earned after 16 years = $93649

Explanation:

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Total amount is calculated below:

\begin{gathered} A=P(1+r)^t \\  \\ A=50000(1+0.04)^{16} \\  \\ A=50000(1.04)^{16} \\  \\ A=\$93649 \end{gathered}

Total amount earned after 16 years = $93649

4 0
1 year ago
A bank account yields 7 percent interest, compounded annually. If you deposit $1,000 in the account, what will the account balan
lianna [129]
Hi there
The formula is
A=p (1+r)^t
A future value?
P present value 1000
R interest rate 0.07
T time 5 years
So
A=1,000×(1+0.07)^(5)
A=1,402.55

It's a

Hope it helps
7 0
3 years ago
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