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3 years ago

If smart in math please answer this question I will reward you with brainlest IF CORRECT!

Mathematics

2 answers:

Nutka1998 [239]3 years ago

6 0

Answer:

the answer is true.

Step-by-step explanation:

all 5 pointed stars have point sym

Radda [10]3 years ago

5 0

Answer: True because although this polygon is irregular, it is symmetry.

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An element with mass 490 grams decays by 28.6% per minute. How much of the element is remaining after 16 minutes, to the nearest

agasfer [191]

Answer:

2.2 grams

Step-by-step explanation:

We can use the compound decay formula shown below to solve this:

$F=P(1-r)^t$

Where

F is the final amount (what we want to find)

P is the present amount (490 grams)

r is the rate of decay, in decimal (28.6% = 28.6/100 = 0.286)

t is the time in minutes (16)

Substituting, we get:

$F=P(1-r)^t\\F=490(1-0.286)^{16}\\F=490(0.714)^{16}\\F=2.2355$

So, after 16 minutes, 2.2355 grams will be remaining.

Rounded to nearest tenth of a gram (1 decimal place) = 2.2 grams remaining

5 0

4 years ago

Factor and solve the quadratic y=x2+5x-6

Phantasy [73]

This is the answer y=-4x-4

3 0

3 years ago

Read 2 more answers

72.4 divided by 4 please help!!!!

wariber [46]

Answer:

18.1

hope it helps mate

8 0

3 years ago

Read 2 more answers

50 POINTS TO WHOEVER HELPS WITH THIS I NEED IT ASAP PLEASE HELP

Tresset [83]

Answer:

4a ) Difference ⇒ $ 63.24,

4b ) 4 children

Step-by-step explanation:

4a ) If the number of children is represented by the value of x, let us substitute a family of 2 children as value of x into this equation we are given;

y = 21.08 * ( 2 ) + 85.15 ⇒ Multiply 21.08 by 2,

y = 42.16 + 85.15 ⇒ Combine like terms,

y = 127.31

If y ⇒ amount spent on grocery's, let us solve for the amount spent on 5 children, and subtract from this amount;

y = 21.08 * ( 5 ) + 85.15 ⇒ Multiply 21.08 by 5,

y = 105.4 + 85.15 ⇒ Combine like terms,

y = 190.55

Difference; 190.55 - 127.31 = 63.24,

Solution; Difference ⇒ $ 63.24

4b ) If the amount is $ 169.47, let us plug it into our given equation provided amount spent on groceries ⇒ y;

169.47 = 21.08x + 85.15 ⇒ Subtract 85.15 from either side of equation,

21.08x = 84.32 ⇒ Divide either side 21.08,

x = 4 children

Solution; 4 children

7 0

3 years ago

on a map, the length of a nature center Trail is 6.5 cm. If the scale is 2 cm to 10 km oh, what is the actual Trail? BRAINLY

mash [69]

Answer:

32.5 km

Step-by-step explanation:

6.5 / 2 = 3.25

3.25 x 10 = 32.5 km

Hope that helps!

6 0

3 years ago

Read 2 more answers