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Goryan [66]
2 years ago
8

the fee for charging an ethe graph of this step function?lectric car at Station A is $2 to start and $4 for each hour or fractio

n for an hour. Which point is not included in
Mathematics
1 answer:
olya-2409 [2.1K]2 years ago
3 0
No he is very back boy dog
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f x + y is rational, must x and y each be rational? A) Yes; because the sum of rationals is rational. B) No; because the sum of
Rudik [331]
The answer is D) Yes; because x and y must be integers, and integers are rational.
7 0
3 years ago
How to find the surface area of a prism
Anuta_ua [19.1K]

Answer:

If you are talking about the rectangular prism the equation is  

2 × L × W + 2 × L × H + 2 × W × H

If you are talking about Triangular prism the equation is

B × H + L × S + L × B + L × C

5 0
3 years ago
Solve the equations by factoring:<br><br>x^2−3x−40=0<br><br>4x^2−81=0
Alja [10]

Answer:

see explanation

Step-by-step explanation:

Given

x² - 3x - 40 = 0

Consider the factors of the constant term (- 40) which sum to give the coefficient of the x- term (- 3)

The factors are - 8 and + 5, since

- 8 × 5 = - 40 and - 8 + 5 = - 3, thus

(x - 8)(x + 5) = 0 ← in factored form

Equate each factor to zero and solve for x

x - 8 = 0 ⇒ x = 8

x + 5 = 0 ⇒ x = 5

------------------------------------------------------

Given

4x² - 81 = 0 ← this is a difference of squares and factors in general as

a² - b² = (a + b)(a - b), thus

4x² - 81

=(2x)² - 9²

= (2x + 9)(2x - 9) = 0 ← in factored form

Equate each factor to zero and solve for x

2x + 9 = 0 ⇒ 2x = - 9 ⇒ x = - \frac{9}{2}

2x - 9 = 0 ⇒ 2x = 9 ⇒ x = \frac{9}{2}

8 0
3 years ago
Read 2 more answers
A baseball player gets 7 hits in the first 15 games of the season. if he continues hitting at the same rate, how many hits will
inessss [21]
Hey there,
15 games = 7 hits
1 game = 7 / 15
             = <span>0.46666666666
45 games = </span><span>0.46666666666 x 45
                 = 21

Hope this helps :))

<em>~Top♥</em>
</span>
3 0
3 years ago
What is disk used on a place value chart
enot [183]
These concepts become more clear when teachers use number disks instead of base ten blocks. Place value is a very important concept for elementary students because base ten is the foundation of our number system.
3 0
3 years ago
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