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3 years ago

Evaluate if c = 2 and d = –3.

Mathematics

2 answers:

Gemiola [76]3 years ago

5 0

Answer:

$3c \div d$

If c = 2, then

$3(2) \div d$

If d=-3, then

$3(2) \div ( - 3)$

We now evaluate

$6 \div - 3$

$- 2$

The answer is -2

klio [65]3 years ago

3 0

Answer:

B : -2

Step-by-step explanation:

$3(2) \div ( - 3) \\ 6 \div ( - 3) \\ - 2$

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Elyse had of a pizza left over. She ate of the

LiRa [457]

Answer:

could you tell me the amount of pizza there was?

Step-by-step explanation:

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3 years ago

The sum of three consecutive terms in an arithmetic sequence is 27, and their product is 585. find the three terms.

sammy [17]

$\text{the three consecutive terms in an arithmetic sequence}\\a;\ a+d;\ a+2d\\\\\text{system of equals}\\\\ \left\{\begin{array}{ccc}a+a+d+a+2d=27\\a(a+d)(a+2d)=585\end{array}\right\\ \left\{\begin{array}{ccc}3a+3d=27&|:3\\a(a+d)(a+2d)=585\end{array}\right\\ \left\{\begin{array}{ccc}a+d=9&\to d=9-a\\a(a+d)(a+2d)=585\end{array}\right\\$
$\text{substitute to the second equation}\\\\a(a+9-a)(a+2(9-a))=585\\\\a(9)(a+18-2a)=585\\9a(18-a)=585\ \ \ |:9\\a(18-a)=65\\18a-a^2=65\ \ \ |\text{change the signs}\\a^2-18a=-65\\a^2-2a\cdot9=-65\ \ \ |+9^2\\\underbrace{a^2-2a\cdot9+9^2}_{(a-b)^2=a^2-2ab+b^2}=-65+9^2\\(a-9)^2=16\to a-9\pm\sqrt{16}\\a-9=-4\ \vee\ a-9=4\ \ \ |+9\\a=5\ \vee\ a=13\\\\d=9-5=4\ \vee\ d=9-13=-4$
$Answer:\ a=5;\ a+d=9; a+2d=13\ vee\ a=13;\ a+d=9;\ a+2d=5$

5 0

3 years ago

solve the eqution 9.95+0.30s=c c is the amount of dollars a website charges for downloading songs s stands ffor number of songs

lutik1710 [3]

9.95 + 0.30s = C

9.95

9.95 + 10.5 = C

C = 20.45

hope this helps!

~LEAN~

5 0

3 years ago

Factor the expression completely <br> -15t-6

Tema [17]

In order to factor this, we will need to take something out to get it to factor. Lets take out a greatest common factor, in this case our greatest common factor will be 3.
We will then write it as:

-3(5t+2)

8 0

3 years ago

Read 2 more answers

A waterslide is rented at $500 per day plus a charge per hour of use. The bounce house was used for 5 hours one day, and the tot

Mazyrski [523]

Answer: $500+5x=800$