MATHEMATICS
MIDDLE SCHOOL

Answer:

True becauseIf you look a true “if then” statement, inserted a not in each clause, and reversed the clauses, the new statement would also be true.

Answer:

Answer:

It's true

Step-by-step explanation:

MIDDLE SCHOOL

Together, teammates Pedro and Ricky got 2687 base hits last season. Pedro had 283 more hits than Ricky. How many hits did each player have?

Answer:

Ricky hits 1202 base

Pedro hits = 1485 base

Step-by-step explanation:

Pedro + Ricky = 2687 hits

Let Ricky hits = x

So the Pedro hits will be = x + 283

( x + 283 ) + x = 2687

2 x + 283 = 2687

2 x = 2687 - 283

2 x = 2404

x = 1202

So the Ricky hits 1202 base

Pedro hits (1202 + 283) = 1485 base

MIDDLE SCHOOL

A store sold 50 copies of a magazine for $150. Each copy of the magazine costs the same. Which equation and set of ordered pairs best represents the price, in dollars, of a certain number of copies of the magazine? A: y = 3x; (1, 3), (2, 6), (3, 9)

B: y = 4x; (1, 4), (2, 8), (3, 12)

C: y = 5x; (1, 5), (2, 10), (3, 15)

D: y = 6x; (1, 6), (2, 12), (3, 18)

150/50 = 3

each magazine cost $3

so A is the correct answer

Answer:

y=3x

Step-by-step explanation:

MIDDLE SCHOOL

0.985 rounded to the nearest tenth

They always try to trick you with this. Remember anything 5 or above would round up, anything 4 and under would round down. So look for the tenth place. that's the 9. The number to the right is 8 which is greater than 5. That means round up. You can't round it to 0.1 because that takes it back down. So you just move it over. The answer is 1.0.

MIDDLE SCHOOL

A solution to 3x+4y=-5 and -5x+y=16 in ordered pair

Answer:

(x,y) = (-3, 1)

Step-by-step explanation:

q1 3x + 4y = -5

q2 -5x + y = 16

from q2 y = 16 + 5x

Put into q1

3x + 4 (16 + 5x) = -5

3x + 64 + 20x = -5

3x + 20 x + 64 = -5

23x = -5 -64

23x = -69

x = -69/23

x = -3

y = 16 + 5(-3)

y = 16 - 15

y = 1

(x,y) = (-3, 1)

HIGH SCHOOL

what are the domain and range of f(x) = 2(3^x)? domain: (-∞,∞); range: (0,∞) domain: (-∞,∞); range: (2, ∞) domain: (0,∞); range-∞,∞) domain: (2,∞); range: (-∞,∞)

Answer:

A) domain: (-∞,∞); range: (0,∞)

Step-by-step explanation:

The given function f(x) =

Here x represents the domain and f(x) represents the range.

The given function is an exponential function.

The general form of an exponential function y = .

In the given equation, a =3 which is greater than 1. Therefore, when x increases the function f(x) tends to infinity.

When x decreases the function f(x) tends to zero.

That is, when x --> ∞, the function f(x) --> ∞

When x --> -∞, the function f(x) --> 0

Therefore, the function has the following domain and range.

Domain = (-∞, ∞)

Range = (0, ∞)

MIDDLE SCHOOL

8 less than twice a number is twelve .

8 - -2×2=12.............

The answer is 12 = 2x - 8, where x represents the unknown number.

12 = 2x - 8

20 = 2x

x = 10

The unknown number is ten.

HIGH SCHOOL

An algebra test contains 38 problems. Some of the problems are worth 2 points each. The rest of the questions are worth 3 points each. A perfect score is 100 points. How many problems are worth 2 points? How many problems are worth 3 points?

Let 'x' be the problems worth 2 points.

Let 'y' be the problems worth 3 points.

Since, there are 38 total problems.

So, (equation 1)

x = 38-y

Since, a perfect score is 100 points.

So, (equation 2)

Substituting the value of 'x', we get

y = 24

x+y = 38

x = 38-24 = 14

So, 14 problems are worth 2 points and 24 problems are worth 3 points.

Total questions in the test = 38

Let 2 points questions be = x

Let 3 points questions be = y

As total questions are 38, so

From here, we can derive x as: ...... (i)

As given, few questions are 2 marks each and rest 3 marks each and perfect square is 100, so we get,

.......(ii)

Put the value of y from (i) in (ii)

y=24

Putting y in equation (i), we get

x=14

Hence, 2 points questions are = 14

3 points questions are = 24

MIDDLE SCHOOL

You find out that you have to walk 8939 mm to the grocery store, is that a long? How do you know? Help me plsss

8939 mm equals 8.939 meters which isn't that long and I found that becuase if you use the acronym King Henry Died By Drinking Chocolate Milk

you would see you moved three decimal place to the left to get to the base measurement

you would see you moved three decimal place to the left to get to the base measurement

MIDDLE SCHOOL

A balloon with a small leak loses 1% of its volume each day. If originally contains 24 liters of gas, what is the volume at the end of one week.

ANSWER

The volume at the end of one week will be 22.32 liters.

EXPLANATION

If the balloon with a small leak loses 1% of its volume each day, then by the end of one week, it will lose 7℅ of its volume.

If the balloon originally contains 24 liters of gas, then this corresponds to 100%.

The volume at the end of one week will correspond to (100-7)%=93%

The volume at the end of one week is

The volume at the end of one week will be 22.32 liters.

EXPLANATION

If the balloon with a small leak loses 1% of its volume each day, then by the end of one week, it will lose 7℅ of its volume.

If the balloon originally contains 24 liters of gas, then this corresponds to 100%.

The volume at the end of one week will correspond to (100-7)%=93%

The volume at the end of one week is