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Debora [2.8K]
3 years ago
9

An element with mass 210 grams decays by 8.3% per minute. How much of the element is remaining after 15 minutes, to the nearest

10th of a gram?
Mathematics
1 answer:
alexandr1967 [171]3 years ago
0 0

Answer:

57.2 g

Step-by-step explanation:

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CAN SOMEONE PLEASE HELP ME WITH THIS!! ILL GIVE YOU BRAINLIST ANSWER <br> IMAGE DOWN BELOW!
Basile [38]

how long is |MN| when you measure it and do you know anything about the length of |NO| and |OP|?

assuming |MN|= 7.7 ; |NO|= 4.7 ; |MO|= 5.5:

o²= m²+n²

= 4.7²+5.5²

=52.34

o=V52.34

≈7.23

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kolezko [41]
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5 0
2 years ago
Determine if the given ordered pairs are solution of x+ 4y = 7.
const2013 [10]

Answer:

(3, 1 ) is a solution

Step-by-step explanation:

To determine if the given points are solutions, substitute the x and y values into the left side of the equation and if equal to the right side then they are solutions.

(3, 1 )

3 + 4(1) = 3 + 4 = 7 = right side , then a solution

(2, 1 )

2 + 4(1) = 2 + 4 = 6 ≠ 7 ← not a solution

6 0
2 years ago
7th grade math help me please
Vlada [557]

Answer:

what do you need help with?

Step-by-step explanation:

3 0
2 years ago
a toy manufacturer needs a piece of plastic in the shape of a right triangle with the longer leg 6cm more than the shorter leg a
Karolina [17]
X= shorter leg
x+6= longer leg
(x+6)+6= hypotenuse

Use the Pythagorean theorem to find the length of each side.

a= one leg
b= other leg
c= hypotenuse.

SHORTER LEG:
a^2 + b^2= c^2
substitute each length above

x^2 + (x+6)^2= [(x+6)+6]^2
square each set of parentheses; add inside right side parentheses before squaring

x^2 + (x+6)(x+6)= (x+12)(x+12)
squaring is multiplying each parentheses by itself one time; use the FOIL method: multiply first, multiply outside, multiply inside, multiply last

x^2 + x^2 + 6x + 6x + 36= x^2 + 12x + 12x + 144
combine like terms

2x^2 + 12x + 36= x^2 + 24x + 144
subtract x^2 from both sides

x^2 + 12x + 36= 24x + 144
subtract 24x from both sides

x^2 - 12x + 36= 144
subtract 144 from both sides

x^2 - 12x - 108= 0
factor

(x + 6)(x - 18)= 0
set each parentheses equal to 0

x + 6= 0
x= -6

x - 18= 0
x= 18 cm shorter leg

***Since a side cannot be a negative number, x= 18. Substitute x=18 to find the other sides.

LONGER LEG:
= x+6
= 18 + 6
= 24 cm longer leg

HYPOTENUSE:
= (x+6)+6
= 18 + 6 + 6
= 30 cm hypotenuse


CHECK:
18^2 + 24^2= 30^2
324 + 576= 900
900= 900


ANSWER:
x= 18 cm shorter leg
x+6= 24 cm longer leg
(x+6)+6= 30 cm hypotenuse

Hope this helps! :)
8 0
2 years ago
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