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3 years ago

The population of center city is modeled by exponential function f, where x is the number of years after the year 2015

Mathematics

1 answer:

Vladimir [108]3 years ago

6 0

Find the ratio of the area to the square radius for each circle.

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On a coordinate plane, a line goes through (0, 4) and (4, 16). The line representing the first table is shown in the graph. What

puteri [66]

Answer:

x=3

y=13

Step-by-step explanation:

okay so what that means is that the two equations are y=-x+16 and y=3x+4

so y+x=16

y-3x=4

so 4x=12 so x=3

y=13 is the solution

4 0

3 years ago

Read 2 more answers

betty took a total of 28 quizzes over the course of 7 weeks. after attending 8 weeks of school this quarter, how many quizzes wi

goldenfox [79]

Answer:

32 quizzes

Step-by-step explanation:

She take 4 quizzes by week.

28/7=4.

Then, 4*8=32

8 0

3 years ago

The sum of the digits of a two-digit number is 13. The units digit is one more than twice the tens digit. Find the number, and..

SCORPION-xisa [38]

Answer:

1)49

2)231

Step-by-step explanation:

4+9=13

4*2=8

8+1=9

2+3+1=6

2+1=3

1*2=2

8 0

3 years ago

Read 2 more answers

Please help grades are due tmr

nignag [31]

The slope of every horizontal line is 0 because that is based on the formula. If it's horizontal on the x axis for example, the point slope will be 0,0, also the horizontal line is the numerator, i think. And the undefined slope is vertical because it's the denominator.

6 0

3 years ago

Ella has 0.5 lbs of sugar. How much water should she add to make the following concentrations? Tell Ella how much syrup she will

olya-2409 [2.1K]

Answer:

1. 20% - add 2 lbs of water to get 2.5 lbs of syrup

2. 25% - add 1.5 lbs of water to get 2 lbs of syrup

3. 1.5% - add 32.833 lbs of water to get 33.333 lbs of syrup

Step-by-step explanation:

Ella has 0.5 lbs of sugar. Let x lbs be the amount of water Ella should add to get the syrup.

1. 20% syrup:

0.5 lbs - 20%

x+0.5 lbs - 100%

Write a proportion:

$\dfrac{0.5}{x+0.5}=\dfrac{20}{100}\\ \\0.5\cdot 100=(x+0.5)\cdot 20\\ \\50=20x+10\\ \\20x=50-10\\ \\20x=40\\ \\x=2\ lbs$

To get 20% syrup Ella should add 2 lbs of water. The total weight of strup is 2.5 lbs.

2. 25% syrup:

0.5 lbs - 25%

x+0.5 lbs - 100%

Write a proportion:

$\dfrac{0.5}{x+0.5}=\dfrac{25}{100}\\ \\0.5\cdot 100=(x+0.5)\cdot 25\\ \\50=25x+12.5\\ \\25x=50-12.5\\ \\25x=37.5\\ \\x=1.5\ lbs$

To get 25% syrup Ella should add 1.5 lbs of water. The total weight of strup is 2 lbs.

3. 1.5% syrup:

0.5 lbs - 1.5%

x+0.5 lbs - 100%

Write a proportion:

$\dfrac{0.5}{x+0.5}=\dfrac{1.5}{100}\\ \\0.5\cdot 100=(x+0.5)\cdot 1.5\\ \\50=1.5x+0.75\\ \\1.5x=50-0.75\\ \\1.5x=49.25\\ \\x=\dfrac{49.25}{1.5}\approx 32.833\ lbs$

To get 1.5% syrup Ella should add 32.833 lbs of water. The total weight of strup is 33.333 lbs.

7 0

3 years ago