1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Varvara68 [4.7K]
3 years ago
11

Evaluate [-3c] for c = 4.2

Mathematics
1 answer:
Maslowich3 years ago
6 0

Hey there!

Guide

• 2 Negatives = [Positive]

• 1 positive & 1 negative = [Negative]

• 2 positives = [Positive]

• 1 negative & 1 positive = [Negative]

° So, this means that your answer most likely will equal a NEGATIVE number because you have 1 NEGATIVE (-3) number and 1 POSITIVE (“c” or 4.2) number.

-3c

= -3(4.2)

= -12.6

Therefore, your answer is: -12.6

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

You might be interested in
What is the area of this triangle ?!
fomenos

Answer:

35.

Step-by-step explanation:

To find the area, multiply the length and the width.

A = L x W

7 x 5 = 35

6 0
3 years ago
Read 2 more answers
What is the surface area of this rectangular prism?
stira [4]

i think the answer is A.

8 0
3 years ago
Read 2 more answers
What is the solution of the system for 1-3?
Aloiza [94]

Answer:

Step-by-step explanation:

4 0
3 years ago
a port and a radar station are 2 mi apart on a straight shore running east and west. a ship leaves the port at noon traveling no
Rom4ik [11]

Answer:

The rate of change of the tracking angle is 0.05599 rad/sec

Step-by-step explanation:

Here the ship is traveling at 15 mi/hr north east and

Port to Radar station = 2 miles

Distance traveled by the ship in 30 minutes = 0.5 * 15 = 7.5 miles

Therefore the ship, port and radar makes a triangle with sides

2, 7.5 and x

The value of x is gotten from cosine rule as follows

x² = 2² + 7.5² - 2*2*7.5*cos(45) = 39.04

x = 6.25 miles

By sine rule we have

\frac{sin A}{a} = \frac{sin B}{b}

Therefore,

\frac{sin 45}{6.25} = \frac{sin \alpha }{7.5}

α = Angle between radar and ship α

∴ α = 58.052

Where we put

\frac{sin 45}{6.25} = \frac{sin \alpha }{x} to get

\frac{x}{6.25} = \frac{sin \alpha }{sin 45} and differentiate to get

\frac{\frac{dx}{dt} }{6.25} = cos\alpha\frac{\frac{d\alpha }{dt}  }{sin 45}

\frac{15sin45 }{6.25cos\alpha } =\frac{d\alpha }{dt}  }= 3.208 degrees/second = 0.05599 rad/sec.

6 0
3 years ago
9) EASY POINTS WILL GIVE BRAINLIST TO BEST ANSWERS
ra1l [238]
You bought a magazine for $5 and four erasers. you spent a total of $25.

Magazine cost: 5$ each
Eraser cost: X$ each

Total cost is the number of items (1 magazine) times the cost of each item (5$). We don't know the cost of each eraser, so we represent that using a variable, X.

1(5) + 4(X) = 25

5 + 4X = 25

subtract 5 from both sides

4X = 25 - 5

4X = 20

divide both sides by 4

X = 20/4

X = 5

Each eraser cost 5$
3 0
2 years ago
Read 2 more answers
Other questions:
  • stephanie has 6 classes a day at school each class is 52 minutes long she goes to school 5 days a week how much time does he spe
    11·2 answers
  • I need help asap :):):)
    15·2 answers
  • The height of the shortest man in history was 68 cm. This is 204 less than the height of the tallest man. how tall was the talle
    13·1 answer
  • Using distance formula i tried this one for myself and just couldn't get it
    12·1 answer
  • What is the radius for the circle given by the equation x^2+(y-3)^2=21
    7·2 answers
  • Please help solve this? (:
    6·1 answer
  • Max walks 10 meters in 4 seconds what is his walking rate in meters per second?
    11·2 answers
  • GEOMETRY ASSIGNMENT! HELP!!!! BRAINIEST ANSWER + POINTS!!! EXPLANATION IS NECESSARY! TY
    14·1 answer
  • Fiona, Dan and Stephen share £66 in a ratio 1:3:2. How much money does each person get?
    10·1 answer
  • Help me with my math
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!