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katrin2010 [14]
3 years ago
11

Which expression is equivalent to 7(-3k)

Mathematics
1 answer:
rosijanka [135]3 years ago
8 0

Answer:

-21k=7(-3k)................………………

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How long must $542 be invested at a rate of 7 percent to earn a 303.52 interest
Marizza181 [45]
How long must $542 be invested at a rate of 7 percent to earn a 303.52 interest

5 0
3 years ago
Roy planted corn on 1/5of his land. If he planted45 acres of corn, how many acres of land doeshe have?(A) 90(B) 112 (1/2)(C) 135
melisa1 [442]

Correct option is C. He has 225 acres of land .

Let the Number of acres of land Roy have = x

As he planted corn on  1/5  of his land,

Number of acres of his land planted with corn =  1/5  × Number of acres of land Roy have

=  x/5

As he planted 45 acres of his land with corn,

⇒ x/5​

 = 45

⇒x = 45 × 5

⇒x = 225

Therefore, number of acres of land Roy have is   225  .

To learn more about fraction from given link

brainly.com/question/78672

#SPJ4

4 0
2 years ago
Find f(−1) given that f(x)=x3+2x2+3x+4. <br>A. 10 <br>B. -2 <br>C. 2 <br>D. -10
Finger [1]

Answer:

The answer is option C

Step-by-step explanation:

f(x) = x³ + 2x² + 3x + 4

To find f(-1) substitute the value of x that's

- 1 into f(x)

That's

<h3>f( - 1) =  ({ - 1})^{3}  + 2 ({ - 1})^{2}  + 3( - 1) + 4 \\  =  - 1 + 2(1)  - 3 + 4 \\  =  - 1 + 2 - 3 + 4 \\  = 1 - 3 + 4</h3>

We have the final answer as

<h3>f( - 1) = 2</h3>

Hope this helps you

8 0
4 years ago
SOMEONE HELP ME PLEASE
marin [14]

Answer:

Step-by-step explanation:

Direct variation problems can easily be solved with proportions, namely:

\frac{x}{y} :\frac{2}{5}=\frac{4}{y} and cross multiply to get

2y = 20 so

y = 10

5 0
3 years ago
Read 2 more answers
Tickets for a concert cost $8 online plus a $3
mash [69]

Answer:

3 tickets

Step-by-step explanation:

8x+3 = 9x

x = 3

6 0
2 years ago
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