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3 years ago

Please help me with these questions please I need help? I'm confused with these questions can somebody explain me please.

Mathematics

1 answer:

san4es73 [151]3 years ago

5 0

Rationals are whole numbers no negative numbers or decimals or fractions and Intergers are only negativd numbers. Absolute Value is a negative number changed into a whole number. Hope this helps.

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What is the distance between point P and point R?

stealth61 [152]

Answer:

PR = 10

Step-by-step explanation:

PR = $\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

The coordinates for P and R are (0,4) and (-6,-4) respectively.

So you plug in the values:

PR = $\sqrt{(-6-0)^2+(-4-4)^2}$

PR = $\sqrt{(-6)^2+(-8)^2}$

PR = $\sqrt{36+64}$

PR = $\sqrt{100}$

PR = 10

3 0

3 years ago

What is the formula for an eastbound car is going 4 miles per hour faster than a westbound car. the cars are 208 miles apart 2 h

ivanzaharov [21]

Draw a diagram to illustrate the problem as shown below.

Let v = speed of the westbound car, mph

Because the eastbound car travels 4 mph faster than the westbound car, its speed is (v+4) mph.

After 2 hours,
the westbound car travels 2v miles west, and the eastbound car travels 2(v+4) miles east.
Because they become separated by 208 miles, therefore
2v + 2(v+4) = 208
4v + 8 = 208
4v = 200
v = 50 mph

The westbound car travels at 50 mph.
The eastbound car travels at v+4 = 54 mph

Answer: The eastbound car travels at 54 mph.

7 0

3 years ago

Consider the curve C parametrized by x = −1 + 7 sin t and y = 1 2 − 7 cos t for −π ≤ t ≤ 5π. Then C is a circle of radius with c

otez555 [7]

This should not be in the elementary school section I didn't even learn about this....

4 0

3 years ago

In a set of real numbers, the first number less then -3 is -4 true or false

Annette [7]

Answer:

true

Step-by-step explanation:

the bigger the number of a negative integer, the smaller the value become

8 0

3 years ago

Read 2 more answers

Eight decreased by three times the sum of a number and six Write as an algebraic expression

Advocard [28]

8-3(x+6)

explanation:

it just makes sense lol but also bc “8 decreased by three” means “8 minus 3”

then “times” means “multiply”

then “a sum” means “addition”

then “a number” since we don’t know what a number is then we use “x”

“and” means “addition”

“a number and six” means “x+6”

3 0

3 years ago