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3 years ago

What strategy would you use to solve these facts involving 3 and 7?8 x 3 7 x 4

Mathematics

2 answers:

Oksanka [162]3 years ago

8 0

probably the math strategy.

it might just be me tho.

iVinArrow [24]3 years ago

7 0

$8\cdot3=7\cdot3+3\\ 7\cdot4=7\cdot3+7$

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In yoga class, all of the students are lined up according to height. Andy notices that the number of students who are taller tha

hichkok12 [17]

Answer:

The number of students in the class is 21

Step-by-step explanation:

The first thing to consider is Andy.

Let x be the number of students who are taller than Andy.

Then the number of the rest students, excluding Andy, is 4x, according to the condition.

So, the total number of students in the class is (x + 4x + 1), or 5x+1.

Next, consider Violetta.

Let y be the number of students who are shorter than Violetta.

Then the number of the rest students, excluding her, is 3y, according to the condition.

So, the total number of students in the class is (y + 3y + 1), or 4y+1.

We see, that the number of students in the class MINUS one is a multiple of 4 (four) and of 5 (five), at the same time.

So, the number of students in the class is EITHER 20+1 = 21 OR 40+1 = 41, if consider couple of minimal values.

But 41 is excluded by the condition, leaving a UNIQUE ANSWER:

The number of students in the class is 21.

6 0

3 years ago

A number is chosen at random from 1 to 25. Find the probability of selecting an even number that is greater than 13.

mamaluj [8]

Answer:

14 16,18,20 22,24

so, 6 out of 24

6/24 simplifies to 1/4

6 0

3 years ago

A phone company offers two monthly plans. Plan A costs $23 plus an additional $0.12 for each minute of calls. Plan B costs $18 p

Alona [7]

Answer:

250 minutes of calling will cost same using both plans.

$53

Step-by-step explanation:

Please consider the complete question.

A phone company offers two monthly plans. Plan A costs $23 plus an additional $0.12 for each minute of calls. Plan B costs $18 plus an additional $0.14 of each minute of calls. For what amount of calling do the two plans cost the same? What is the cost when the two plans cost the same?

Let x represent the number of call minutes.

The total cost of calling for x minutes using plan A would be cost of x minutes plus fixed charge that is $0.12x+23$ .

The total cost of calling for x minutes using plan B would be cost of x minutes plus fixed charge that is $0.14x+18$ .

To find the number of minutes for which both plans will have same cost, we will equate total cost of x minutes for both plans and solve for x.

$0.14x+18=0.12x+23$

$0.14x-0.12x+18=0.12x-0.12x+23$

$0.02x+18=23$

$0.02x+18-18=23-18$

$0.02x=5$

$\frac{0.02x}{0.02}=\frac{5}{0.02}$

$x=250$

Therefore, calling for 250 minutes will cost same using both plans.

Upon substituting $x=250$ in expression $0.14x+18$ , we will get:

$0.14(250)+18=35+18=53$

Therefore, the cost will be $53, when the two plans cost the same.

5 0

3 years ago

A baseball player throws a 95mph fastball straight up into the air. The position equation, which gives the height of the ball at

Lana71 [14]

Set s(t) = 0 which means it hits the ground. The formula doesn't fit the parameters given as it shows that the pitcher is standing on something 37 feet high.
<span>s(t)=-16t^2+140t+37 and has an initial velocity of 140.
Graphing or solving this, t= 9 seconds when it hits the ground.
The velocity V(t) is the derivative of s(t)
V(t) = -32t+140
V(9) = -148 ft/second which is going down
</span>

3 0

3 years ago

PLEASE HELP ME I BEGGING YOU PLEASE HELP I DO ANYTHING JUST HELP

babymother [125]

Answer:

First of all, the answer is E.

Step-by-step explanation:

Based on the graph, comment what you think for 2. X axis is number of cones, y is cost of the cones. ;)

8 0

3 years ago