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Nady [450]
2 years ago
6

Which statement about the dilation of these triangles is true?

Mathematics
1 answer:
Arisa [49]2 years ago
7 0
The scale factor is 7
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360 words in 1/12 hour. Second try 360 words in 1/15 hour. Was he faster or slower second attempt
xxTIMURxx [149]

Answer:

Second Attempt is faster.

Step-by-step explanation:

He reads 360 words in \frac{1}{12} hour in the first attempt and in the second attempt he reads the same number of words in \frac{1}{15} hour.

Since, $ \frac{1}{15} < \frac{1}{12} $ he takes less time in the second time. Less time means the work is done faster.

Therefore, second attempt is faster.

8 0
3 years ago
How many roots does this has?<br>x^2+(2√5x)+2x=-10​<br>find Discriminant
Alexxandr [17]

Given:

The equation is

x^2+(2\sqrt{5})+2x=-10

To find:

The number of roots and discriminant of the given equation.

Solution:

We have,

x^2+(2\sqrt{5})x+2x=-10

The highest degree of given equation is 2. So, the number of roots is also 2.

It can be written as

x^2+(2\sqrt{5}+2)x+10=0

Here, a=1, b=(2\sqrt{5}+2), c=10.

Discriminant of the given equation is

D=b^2-4ac

D=(2\sqrt{5}+2)^2-4(1)(10)

D=20+8\sqrt{5}+4-40

D=8\sqrt{5}-16

D\approx 1.89>0

Since discriminant is 8\sqrt{5}-16\approx 1.89, which is greater than 0, therefore, the given equation has two distinct real roots.

3 0
2 years ago
You want to buy a camera. The retail price is $75. The camera is on sale for 15% off . What is the sale price of the camera?
ludmilkaskok [199]

Answer:

$63.75

Step-by-step explanation:

15% off

Get percentage of retail price

1-0.15 = .85

0.85 = 85%

The sale price is 85% of the retail price

Multiply

0.85 * 75

$63.75

7 0
1 year ago
Simplify the expression: 2(4 + 6f) plz help this is my end of the year assesment Thanks!
julia-pushkina [17]

Answer:

8+12f

hope this helps

have a good day :)

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
What’s the answer for this question
Zinaida [17]

Answer:

It's app. 50.24

Step-by-step explanation:

The area of a circle is A = pi * r ^2

So the area is

= pi * 16

in the question it says to use 3.14 for pi instead

so multiply 16 * 3.14 = 50.24

8 0
3 years ago
Read 2 more answers
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