All categories

3 years ago

I am confused on this quadratic problem.

Mathematics

1 answer:

hodyreva [135]3 years ago

5 0

Answer:

(x+5)^2=81 would be correct

Step-by-step explanation:

solution (if you want it)

x² + 10x + 25 = 81

x² + 10x - 56 = 0

(x + 14)(x - 4) = 0

x = 4, x = -14

You might be interested in

Write sin^2(x)*cos^2(x) as a single power of cosine, show work

WINSTONCH [101]

This is what you're looking for if I'm not mistaken
sin²x + cos²x = 1
So:
sin²x = 1 - cos²x

∴ sin²x * cos²x = (1 - cos²x) * cos²x
= cos²x.(1 - cos²x)
(= cos²x - cos⁴x)

7 0

3 years ago

In a certain Algebra 2 class of 20 students, 8 of them play basketball and 7 of them play baseball. There are 8 students who pla

laila [671]

I think the probability is 05%

7 0

4 years ago

Please help me with this thank you

JulsSmile [24]

Answer:

I believe the answer to question (a) is 3085 ft and for (b) i think it's 238 ft

5 0

3 years ago

Read 2 more answers

-5^2 find the power

Art [367]

Answer:

Hey there!

When we have a^b, b is the power.

Thus, in -5^2, 2 is the power.

Let me know if this helps, or if you need more help :)

5 0

4 years ago

Read 2 more answers

In 4 hours, an experienced cook prepares enough pies to supply a local restaurant's daily order. Another cook prepares the sam

vodka [1.7K]

Answer:

$9\frac{1}{3}hours$

Step-by-step explanation:

Let third cook take x hours to prepare the same number of pies y alone

Let y be the number of pies

In 1 hour ,third cook prepare pies= $\frac{y}{x}$

One experienced cook takes time to prepare enough pies =4 hours

In 1 hour , cook prepare pies= $\frac{y}{4}$

Another cook takes time to prepare same number of pies =7 hours

In 1 hour , another cook prepare pies= $\frac{y}{7}$

All three cooks take time to prepare the same number of pies=2 hours

In 1 hour,all three cooks prepare pies= $\frac{y}{2}$

According to question

$\frac{y}{4}+\frac{y}{7}+\frac{y}{x}=\frac{y}{2}$

$y(\frac{1}{4}+\frac{1}{7}+\frac{1}{x})=\frac{y}{2}$

$\frac{1}{4}+\frac{1}{7}+\frac{1}{x}=\frac{1}{2}$

$\frac{1}{x}=\frac{1}{2}-\frac{1}{4}-\frac{1}{7}$

$\frac{1}{x}=\frac{14-7-4}{28}=\frac{3}{28}$

$x=\frac{28}{3}=9\frac{1}{3}$ hours

Hence, the third cook takes time to prepare the same number of pies alone= $9\frac{1}{3}hours$

8 0

3 years ago