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algol [13]
4 years ago
5

How to do this? I don’t know how to find the answer please help me

Mathematics
2 answers:
IrinaK [193]4 years ago
7 0
The answer is 20.
(25^2 - 15^2)^.5 = 20


Explanation:
It's a use of the Pythagorean theorem. DC is a leg of a right triangle. You know the length of the other leg and the hypotenuse.
Tanya [424]4 years ago
6 0

Answer:

20 cm

Step-by-step explanation:

Pythagoras theorem states that a² + b² = c². But what does this actually mean? First of all we need to recognise that it only works in right-angled triangle. If I put the values in you would a² + 15² = 25². So we have to solve for "a". A = DC

a² + 15² = 25²

→ Minus 15² from both sides to isolate a²

a² = 25² - 15²

→ Work out 25² - 15²

a² = 400

→ Square root both sides to isolate a

a = 20

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The point-slope form of the equation of a line that passes through points (8, 4) and (0, 2) is y – 4 = (x – 8). What is the slop
Viktor [21]

Answer:

y = x - 4

Step-by-step explanation:

Rewrite y – 4 = (x – 8) in slope-intercept form.  To do this, solve the given equation for y:

y - 4 = x - 8  →  y = 4 + x - 8, or y = x - 4

5 0
3 years ago
A data set that consists of many values can be summarized using the five-number summary. Arrange these five values in order from
Nuetrik [128]
1 - 2 - 3 - 5. I think that’s right but I’m not sure
8 0
3 years ago
(2a+b)^2 how do you do this
gulaghasi [49]

•  Expand (2a + b)²:

(2a + b)²

= (2a + b) · (2a + b)


Multiply out the brackets by applying the distributive property of multiplication:

= (2a + b) · 2a + (2a + b) · b

= 2a · 2a + b · 2a + 2a · b + b · b

= 2²a² + 2ab + 2ab + b²


Now, group like terms together, and you get

= 2²a² + 4ab + b²

= 4a² + 4ab + b²    <———    expanded form  (this is the answer).


I hope this helps. =)


Tags:  <em>special product square of a sum algebra</em>

3 0
3 years ago
In an ice cream shop there is some money in a drawer. After 6 ice creams were sold, there were 70 euros left in the drawer. Afte
Verizon [17]

Answer: There were 40 euros in the drawer at the beginning.

Step-by-step explanation:

When we subtract 6 from 16, we get 10 more ice-creams were sold.

Similarly, we subtract 70 from 120, we get 50 euros was the total selling price of 10 ice-creams.

i.e. Selling price of 1 ice-cream = (50)÷10 =5 euros

Selling price of 6 ice-creams = 6 x 5 = 30 euros

Money in the drawer at the beginning = 70-30 = 40 euros

Hence, there were 40 euros in the drawer at the beginning.

7 0
3 years ago
Consider the sequence 1, –3, 9, –27, 81, … Which statement describes the sequence?
ludmilkaskok [199]

Answer:

There is a similar problem with the same numbers except with no negatives so it goes 1 , 3 , 9 , 27, 81 for this question the answer is that it diverges.

Step-by-step explanation:

It was on the unit test review for edge and the answer was that it diverges.

8 0
3 years ago
Read 2 more answers
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