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Alexandra [31]
3 years ago
9

Plz, Help me with this question.

Mathematics
1 answer:
lana [24]3 years ago
6 0

Answer:

tjfubckg6bhutn7gid

Step-by-step explanation:

y k j j k u hhgxhfjfrgjtdjfgbyrgfutgjiurgiihfcjtddujcfttfutfitfigdghtyfhbnnfugfigcjfjhkvgbinvhvnvgcchgxcfjfbfucfdbg7gftgrxj6fitr4thtd5gu7h8h8rr8rr5r6748prduigjc8t7g7g7tryio9uhjkkiyfftgcdt54444rj yhcrhxybkchhy k j j k u hhgxhfjfrgjtdjfgbyrgfutgjiurgiihfcjtddujcfttfutfitfigdghtyfhbnnfugfigcjfjhkvgbinvhvnvgcchgxcfjfbfucfdbg7gftgrxj6fitr4thtd5gu7h8h8rr8rr5r6748prduigjc8t7g7g7tryio9uhjkkiyfftgcdt54444rj yhcrhxybkchhy k j j k u hhgxhfjfrgjtdjfgbyrgfutgjiurgiihfcjtddujcfttfutfitfigdghtyfhbnnfugfigcjfjhkvgbinvhvnvgcchgxcfjfbfucfdbg7gftgrxj6fitr4thtd5gu7h8h8rr8rr5r6748prduigjc8t7g7g7tryio9uhjkkiyfftgcdt54444rj yhcrhxybkchh

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The expressions below model different possibilities for the area of a pool. Identify which of the following expressions have at
Anna007 [38]
<h3>Answer: Choice B is correct</h3>

========================================================

Explanation:

Use a graphing tool like GeoGebra, Desmos, or your graphing calculator to plot each expression given as a separate y equation. Four parabolas should result.

The x intercept is the same as the root or zero of a function.

You should find that only choice B has a root thats larger than 4. That specific root being x = 7.

----------------------------

A non-graphing approach:

You can use the quadratic formula or the factoring method to find the roots.

For choice A, it factors to (x+5)(x+6) = 0. The roots are x = -5 and x = -6 which aren't greater than 4. So we cross choice A off the list. Choices C and D are similar stories.

On the other hand, choice B factors to (x-7)(x+2) = 0 and it has roots of x = 7  and x = -2. This is another way to see why choice B is the answer.

Here are the steps for the quadratic formula for choice B

x = \frac{-b\pm\sqrt{b^2-4ac}}{2a}\\\\x = \frac{-(-5)\pm\sqrt{(-5)^2-4(1)(-14)}}{2(1)}\\\\x = \frac{5\pm\sqrt{81}}{2}\\\\x = \frac{5\pm9}{2}\\\\x = \frac{5+9}{2} \ \text{ or } \ x = \frac{5-9}{2}\\\\x = \frac{14}{2} \ \text{ or } \ x = \frac{-4}{2}\\\\x = 7 \ \text{ or } \ x = -2\\\\

The quadratic formula is handy in case factoring is either not possible, or guess-and-check is too lengthy of a process. As you can probably tell, we could use the quadratic formula's results to help construct the factored form.

8 0
2 years ago
Please help me solve this problem. ​
schepotkina [342]

Answer:

Step-by-step explanation:

There is no solution

5 0
3 years ago
Read 2 more answers
Conplete the square to solve the quadratic equation. x<br><img src="https://tex.z-dn.net/?f=1%20%7Bx%7D%5E%7B2%7D%20%20-%206x%20
o-na [289]

Answer:

\large\boxed{x=4\pm2\sqrt6}

Step-by-step explanation:

x^2-6x+12=2x+20\qquad\text{subtract}\ 2x\ \text{and}\ 12\ \text{from both sides}\\\\x^2-8x=8\\\\x^2-2(x)(4)=8\qquad\text{add}\ 4^2=16\ \text{to both sides}\\\\x^2-2(x)(4)+4^2=8+4^2\qquad\text{use}\ (a-b)^2=a^2-2ab+b^2\\\\(x-4)^2=24\iff x-4=\pm\sqrt{24}\\\\x-4=\pm\sqrt{4\cdot6}\\\\x-4=\pm\sqrt4\cdot\sqrt6\\\\x-4=\pm2\sqrt6\qquad\text{add 4 to both sides}\\\\x=4\pm2\sqrt6

6 0
2 years ago
Can someone help me with the questions in the picture?
jolli1 [7]

Answer:

1. x= -4

2. x= 18

3. x= -15

4. x = 6

Step-by-step explanation:

Use relationship of angles to create equations and solve for x

6 0
3 years ago
Read 2 more answers
If f(x) = x2 + 7, what is the value of f(3)?
Mazyrski [523]
Plug in 3 for f(x)
f(3)=(3)²+7
f(3)=9+7
f(3)=16
Hoped this helped!
3 0
3 years ago
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