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3 years ago

If a heart beats 30 times in 40 seconds. How many times will it beat in 1 year?

Mathematics

2 answers:

Murljashka [212]3 years ago

7 0

Answer:

10950

Step-by-step explanation:

1 year = 365

365 × 30

10950

sdas [7]3 years ago

7 0

Answer:

23,652,000 per year

Step-by-step explanation:

30 times in 40 seconds=15 times in 20 seconds

that's 45 times in one minute

45per min x (60m/hr) x (24hr/day)=64,800 per day

x (365 days per year)=23,652,000 per year

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wolverine [178]

Answer:

Ivy is 6 years old and Rose is 12 years old.

Step-by-step explanation:

To solve this problem, two variables are necessary since we have two unknown variables: Ivy's age and Rose's age.

Ivy's age will be $x$

and Rose's age will be $y$

"Ivy is half as old as her sister":

$x=\frac{y}{2}$

this will be our fist equation.

"In six years, Ivy will be two-thirds as old as Rose"

in six years Ivy will have $x+6$ years, and Rose will have $y +6$ years, so for this sentence we have the equation:

$x+6=\frac{2}{3}(y+6)$

this will be our second equation.

Substituting the value of x from the first equation into the second, and solving for y(Rose):

$\frac{y}{2}+6=\frac{2}{3} (y+6)\\\frac{y+12}{2} =\frac{2}{3} (y+6)\\y+12=\frac{4}{3} (y+6)\\3(y+12)=4(y+6)\\3y+36=4y+24\\36-24=4y-3y\\12=y$

Rose is 12 years old.

and Ivy (using the fist equation):

$x=\frac{12}{2}=6$

Ivy is 6 years old.

6 0

3 years ago

Solve for x. −8x+14≥60 OR −4x+50<58

Reika [66]

Answer: The solution is,

$x\leq -\frac{23}{4}$ or $x>-2$

Step-by-step explanation:

Given compound inequality,

-8x + 14 ≥ 60 or -4x + 50 < 58,

By the subtraction property of inequality,

-8x + 14 - 14 ≥ 60 - 14 or -4x + 50 - 50 < 58 -50,

-8x ≥ 46 or -4x < 8

By the division property of inequality,

$-x \geq \frac{46}{8}$ or $-x < \frac{8}{4}$

Using property a > b ⇒ - a < -b,

$x\leq -\frac{23}{4}$ or $x>-2$

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3 years ago

ANSWER THIS TO BE MARKED BRAINLIEST\

krek1111 [17]

The correct answer would be A

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Serga [27]

Where's the options?

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Find the equation of a line that is parallel to the line y=-3x-1 and crosses the y-axis at (0,-8).

Colt1911 [192]

Answer:

Y=-3x-3

Step-by-step explanation:

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2 years ago