If 50 grams of a radioactive substance decomposed to 42 grams in 2 years, then, to the nearest gram, the amount left after 5 years is
30 grams

32 grams

22 grams

40 grams

28 grams

Answers

Answer 1

Answer:

30 grams

Step-by-step explanation:

50-42=8

8÷2=4

4=1 year

5×4=20

50-20=30

Hope u can understant


Related Questions

can somebody help me please​

Answers

A: (3,6)
B: (4,0)
C: (6,0)

Answer: your question is blurry

Step-by-step explanation:

what is 2x + 7x + 8a + 9a

Answers

Answer: 9x + 17a

Step-by-step explanation:

2x + 7x + 8a + 9a

2x+7x= 9x

8a+9a= 17a

= 9x +17a

Answer:

9x + 17a

Step-by-step explanation:

9x + 17a. (A side note is that you can't add x and a together because they are different variables.)

On Monday the price for bottled water was six bottles for $17.88. on Saturday the price was three bottles for $9.33. which day had the higher unit price?

Answers

Answer:

saturday

Step-by-step explanation:

monday:

17.88 (price) divided by 6 (number of bottles) is equal to 2.98 (unit price per bottle)

saturday:

9.33 (price) divided by 3 (number of bottles) is equal to 3.11 (unit price per bottle)

Estimate the quotient 396.5 divided

Answers

Answer:

400.0

Step-by-step explanation:

all your doing is rounding up


Pls help me with this question

B.y=3/4x-6
C.y=-6x+3/4
D.y=6x-3/4

Answers

It’s C because y=6x+3/4

What is the value of 3x^2– 7x + 9 when x = 4?

Answers

Answer:

29

Step-by-step explanation:

just substitute x with 4 in the equation :)

PLSSSSSS HELPPPPPPP FAST WILL GIVE BRAINLIEST

Answers

Answer:

The average number of points scored by a member of the team.

Step-by-step explanation:

The center of the data is another phrase for the mean of the data

Mean: the average of all data given (Add all the numbers up and divide by the amount of numbers there are).

Hope this helped :)

Answer:

I believe the answer would be A.

Step-by-step explanation:

You can get rid of B. and C. since it is in the middle. The highest would be at the top/right side and the lease would be at the bottom/left side. Then the total score does not make much sense because you would have to add up every number

A figure is dilated by a scale factor of 1
39
Explain whether the image is larger than,
smaller than, or the same size as the
original figure.

Answers

Responder:

Si el factor de escala de una figura es mayor que uno, la figura es mayor.

Explicación paso a paso:

Hará que la figura sea más grande porque si es menor que uno, la figura será menor. Por ejemplo, si el factor de escala es la mitad de la cifra, será la mitad más pequeña que la cifra original. Y si el factor de escala es 2, la figura será dos veces más grande que la figura original.

¡Espero que esto funcione!:)

8/x = 32
..................

Answers

Answer:

Step-by-step explanation:

x= 1/4

can someone ease help me​

Answers

Answer:

if the fraction is in missed then the answer is 34 but if not then it's 4

Answer:

2 1/8 X 16 = 42

Step-by-step explanation:

If triangle DEF is dilated by a scale factor of 1/2 with center of dilation at the origin
(0,0), what is the x-coordinate of E'?
Please help 20 points

Answers

Answer:

(4,2)

Step-by-step explanation:

I am not able to see your screen well but these are the points that I saw in the beginning for E. 8,4. Your x value is either left or right and your y value is up and down. I saw 8 units right and 4 u it's up. Now your scale factor is 1/2. Remember if the scale factor is less than one the figure reduces. Our rule for dilations is (x,y) → (kx,ky). The scale factor is represented by K. Since your scale factor is 1/2 we know our triangle will reduce. Let's plug 1/2 in our x and y valued.

So E is (8,4). 8*1/2 is 4 and 4* 1/2 is 2. Are new points are E' (4,2).

The diameter of a circle measures 22 yd. What is the circumference of the circle?
Use 3.14 for , and do not round your answer. Be sure to include the correct unit in your answer.

Answers

Answer:

69.08 yd

Step-by-step explanation:

22 times 3.14 = 69.08 yd

Use the rectangle shown to answer the question.
32 feet
8 feet
Stephanie dilated the rectangle and the dimensions of the image were 24
feet by 6 feet. What was the scale factor used? (In decimal form)

Answers

.75 is the scale factor,
24/32= .75
6/8 = .75

PLEASE HELP ANSWER ASAP I WILL GIVE BRAINLIEST

Mr. Peery has saved $150 to buy an iPhone 12. With his cell phone plan he can buy a new iPhone 12 for $200. If he can only save $10 a week how many weeks will it take for him to get enough money to buy the phone?


Create an equation for the problem here. Don't put any spaces.



How many weeks will it take?

Answers

Answer:

Let number of weeks be x

10x = 200-150

x=50/10

x=5

Thus it would take him 5 weeks to buy himself a iPhone12

Hope it helps

Urgent please!!! I really don’t understand it, tysm to anyone who can answer thissss :))))
(53 points)

Answers

Answer:

(ax + by + cz)/(a + b + c)

Step-by-step explanation:

Average = Sum / Number

In terms of the scores we calculate the sum as:

ax + by + cz

The number is the sum of the frequencies:

a + b + c

Mean average score is:

(ax + by + cz)/(a + b + c)

34 < 5x + 9 < 44
Inequality

Answers

Answer:

5 < x < 7

Step-by-step explanation:

- Move all terms not containing  x  from the center section of the inequality.

25  <  5 x  <  35

- Divide each term in the inequality by  5 .

5 < 1x < 7

5 < x < 7

i hope this helps :)

Point A is located at (-2,-2). Plot all of the points 3 units away that have the same y-coordinate as point A.

Answers

Answer:

Points are ( 1, -2) , (-5, -2)

Step-by-step explanation:

the given point is A ( -2, -2)

If we fix the y coordinate , then we can change only x coordinate

As we want point 3 unit away

So, add 3 and subtract 3 from x coordinate to find the resultant point

If we add 3 to x coordinate , we get

-2 + 3 = 1

So the point be ( 1, -2)

If we subtract 3 to x coordinate , we get

-2 - 3 = -5

So the point be ( -5, -2)

The graph is as follows :

Please help.
Algebra.

Answers

The answer to this algebraic expression is B

What is the slope-intercept form of the equation 8x + 7y - 2 - 0?

Answers

Answer:

y = -8x/7 + 2/7

Step-by-step explanation:

8x + 7y - 2 = 0

7y = -8x+2

y= (-8x + 2)/7

y = -8x/7 + 2/7

slope = -8/7, intercept = 2/7

If a basketball was super inflated and had a rebound ratio of 85%, write an equation to determine what the height of the basketball would be after 6 bounces if it was dropped from a height of 10 ft.

Answers

Answer:

3.77ft

Step-by-step explanation:

According the question

The height of the basketball dropped from a height of 10ft after 6 bound having a rebound ratio of 85%

= 10(17/20)^6 = 3.77 feet

Find the simple interest paid and the amount paid for the loan.

$4800 at 9.9% for 4 years

Answers

Answer:

$1900.80

Step-by-step explanation:

First, converting R percent to r a decimal

r = R/100 = 9.9%/100 = 0.099 per year,

then, solving our equation

I = 4800 × 0.099 × 4 = 1900.8

I = $ 1,900.80

The simple interest accumulated

on a principal of $ 4,800.00

at a rate of 9.9% per year

for 4 years is $ 1,900.80.

PLEASE HELP QUICKLY!!! I'll give Brainliest to the best answer.

Answers

Answer:

y4.5

Step-by-step explanation:

y^7 is the answer :)

Tomas bought 80 tickets for rides at an amusement park. Each ride costs 5 tickets, and Tomas has been on x rides so far. Select all the expressions that show the number of tickets that Thomas has left.

Answers

Answer:

What are the expressions do they tell you

Step-by-step explanation:

Tell me the expressions and i can help you

A person dove more than 100 feet below sea level.

Which value could represent the elevation, in feet, that the person dove?
A. -125
B. -50
C.60
D.150
please help i just have 10 minutes left
dont troll

Answers

Answer:

-125

Step-by-step explanation:

sea level is zero so cant be above that and the answer has to be below -100 and the only option is -125

Answer:

A -125

Step-by-step explanation:

because they went over 100ft below sea level

and if sea level is exactly 0 and they went under it over 100 the only option over 100 with a negative sign to show they went below sea level would be -125

Which expression is equivalent to

27x^2-72x/9x?

Assume that the denominator does not equal zero.

Answers

The expression that is equivalent to 27x² - 72x/9x is 3x - 8

How to determine the equivalent expression?

The expression whose equivalence is to be determined is given as

27x^2-72x/9x

The above expression can be properly expressed as follows

27x² - 72x/9x

Introduce the use of brackets

So, we have

(27x² - 72x)/9x

Factor out x from the numerator

This gives

(27x² - 72x)/9x = x(27x - 72)/9x

Cancel out the common factor

(27x² - 72x)/9x = (27x - 72)/9

Factor out 9 from the numerator

This gives

(27x² - 72x)/9x = 9(3x - 8)/9

Cancel out the common factor

(27x² - 72x)/9x = 3x - 8

Hence, the equivalent expression is 3x - 8

Read more about equivalent expression at

https://brainly.com/question/15775046

#SPJ1

Please help it's due today. Also if you don't know please don't answer.​

Answers

I believe it's x= 20, hopes it help!

Answer:

x=20

Step-by-step explanation:

4 5 x

( 3 ) = 3

20 x

3 = 3

x = 20

Find the measure of angle b

Answers

Answer:

48. ..........hhshhxhxx

Step-by-step explanation:

180-42-90=48

Angles on a straight line add to 180 degrees 42 + 90 because right angle =132 180-132=48 degrees

CAN SOMEONE HELP ME PLS I GIBE BRAINLIST AND POINTS

Answers

Answer:

184.26

Step-by-step explanation:

28.275 + 60 + 96 = 184.26

Please help me with this

Answers

Put one point at -10,6 and another at 6,-10

Bruce flipped a penny 5 times. It landed on heads 2 times and tails 3 times. If he flips the coin a 6th time, what statement is true?
A. It is more likely to be heads.
BIt is equally likely to be heads or tails.
C. It is more likely to be tails.
D. It in not likely to be tails.

Answers

Answer:

B

Step-by-step explanation:

I would say B because they're only 2 options head and tails.

✩brainliest appreciated ✩

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