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3 years ago

When rounding to.the nearest hundred are you to add or subtract?

2 answers:

6 0

Basically you don't really do either, mostly because when your rounding you mostly just look at the number your rounding to. okay so say your number is like 127 you would round to 100 because your number would've been below 150. And we know that five is the middle of every thing. 10 and the whole number system is made up of tens. So when you have to choose to round you have to go up to the next ten so say your number is 27 since it's above 5 you would round to 30. So if you have 127 it's below the 5 mark (which would be 150) so you would round to 100 because it's below that mark.

kicyunya [14]3 years ago

5 0

Answer:

When you round to the nearest hundred:

150 or higher turns into 200, so you'd do add.

But when it's 149 or lower, you simply subtract it by 49.

Step-by-step explanation:

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Bess and Gina earn $45 per week for delivering flowers. Bess worked for x weeks and earned an additional total bonus of $20. Gin

Inessa05 [86]

Answer:

First option: $45x + 20 + 45y$

Step-by-step explanation:

The missing options are:

$45x + 20 + 45y\\65x + 45y\\45x - 20 + 45y\\\\45x + 65y$

We know that "x" represents the number of weeks Bess worked and "y" the number of weeks Gina worked.

According to the data given in the exercise, Gina and Bess earn $45 per week for delivering flowers, this is:

$45x+45y$

Since earned an additional total bonus of $20, then the total money in in dollars that Bess and Gina earned for delivering flowers can be shown with the following expression:

$(45x+20)+45y=45x+20+45y$

Notice that this expression matches with the one shown in the first option.

8 0

3 years ago

carlos drank 24ml of water during football practice in 6 hour. how many liters did he drink per hours on average ?

dlinn [17]

Answer: 4

Step-by-step explanation:

24 ml / 6 hours = 4 ml / 1 hour

3 0

2 years ago

A toy rocket is launched from a platform that is 48 ft high. The rocket height above the ground is modeled by h=-16t^2+32t+48. a

Komok [63]

Answer:

a) 64 feet

b) 3 seconds

Step-by-step explanation:

The maximum height of $h=h(t)$ can be bound by finding the y-coordinate of the vertex of $y=-16x^2+32x+48$ .

Compare this equation to $y=ax^2+bx+c$ to find the values of $a,b,\text{ and } c$ .

$a=-16$

$b=32$

$c=48$ .

The x-coordinate of the vertex can be found by evaluating:

$\frac{-b}{2a}=\frac{-32}{2(-16)$

$\frac{-b}{2a}=\frac{-32}{-32}$

$\frac{-b}{2a}=1$

So the x-coordinate of the vertex is 1.

The y-coordinate can be found be evaluating $y=-16x^2+32x+48$ at $x=1$ :

$y=-16(1)^2+32(1)+48$

$y=-16+32+48$

$y=16+48$

$y=64$

So the maximum height of the rocket is 64 ft high.

When the rocket hit's the ground the height that the rocket will be from the ground is 0 ft.

So we are trying to find the second t such that:

$0=-16t^2+32t+48$

I'm going to divide both sides by -16:

$0=t^2-2t-3$

Now we need to find two numbers that multiply to be -3 and add to be -2.

Those numbers are -3 and 1 since (-3)(1)=-3 and (-3)+(1)=-2.

$0=(t-3)(t+1)$

This implies we have either $t-3=0$ or $t+1=0$

The first equation can be solved by adding 3 on both sides: $t=3$ .

The second equation can be solved by subtracting 1 on both sides: $t=-1$ .

So when $t=3$ seconds, is when the rocket has hit the ground.

5 0

3 years ago

misty bought 3 cd's.the country music cd cost $12.the roc cd cost 2/3 as much as the country music.the platinum edition cd cost

Mandarinka [93]

Country music cd- $12
Rock music cd- 12× 2/3 = $8
Platinum edition cd- $8 x 2 = $16

16+12+8 = $36

Hope this helps :3

5 0

3 years ago

Which best describes the meaning of the statement if A then B

Oliga [24]

Answer:

$a => b \equiv ( \neg a \ \lor \ b )$

Step-by-step explanation:

You can understand the statement from many perspectives, but in terms of proposition logic it is best to understand it as "negation of a" or " b" in mathematical terms is written like this

$a => b \equiv ( \neg a \ \lor \ b )$

You can show that they are logically equivalent because they have the same truth table.

3 0

3 years ago