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
nikitadnepr [17]
2 years ago
9

HELP PLEASE!

Mathematics
1 answer:
Doss [256]2 years ago
3 0
D.
first, eliminate B and C, because the highest degree in these two equation is 3, a 3-degree equation has 3 roots, not 4. 

between A and D, A has the roots 0, 0, 7, and -7, all real roots.

D can be factored into (x²-49)(x²+1)=0
x²=49 or x²=-1
x=7 or -7, x=i or -i    two real roots, two unreal roots 

for the second equation: 
first, find the first term by using the formula:
the nth term=the first term + (n-1)*difference
you are given the 13th term and d=3.7
a13=a1+(13-1)d
1.9=a1+12*3.7
a1=-42.5

the sum of the first 13 terms is S=(a1+a13)*(13/2)=(-42.5+1.9)*6.5=-263.9
You might be interested in
32. Solve the equation below.<br> 12-13<br> = 17
Helga [31]
12-13
12-13=-1
Therefore the equation is false.
4 0
2 years ago
Read 2 more answers
What sums are equal to 6/12?
nadya68 [22]

Hey there!

"What sums are equal to \bold{\frac{6}{12}}?"

\bold{\frac{6}{12}=\frac{1}{2}=0.5 }

  • It <em><u>can't</u></em> be \bold{A. \frac{6}{12} + \frac{6}{12}+ \frac{6}{12}+\frac{6}{12}+\frac{6}{12}+\frac{6}{12}}   because the answer would be \bold{3}
  • It <u><em>can </em></u> be \bold{B.\frac{2}{12} + \frac{1}{12} + \frac{1}{12} +\frac{2}{12}}
  • It <u><em>can</em></u> also be \bold{C. \frac{5}{12} + \frac{1}{12}}
  • It <em>can</em> also again be \bold{\frac{1}{12}+\frac{1}{12}+\frac{1}{12}+\frac{3}{12}}
  • \boxed{\boxed{\bold{Answers: B,C,D}}}}

Good luck on your assignment and enjoy your day!

~\bold{LoveYourselfFirst:)}



6 0
2 years ago
Read 2 more answers
Lupita bought 7 pounds of pretzels at a local wholesaler for $16.80. Her friend Charles bought 5 pounds of pretzels at the super
Galina-37 [17]

Answer:

Charly has the better buy

Step-by-step explanation:

The unit cost is

=16.8/7

=$2.4

Her friend Charles bought 5 pounds of pretzels at the supermarket for $12.75

Unit cost

=12.75/5

=$2.55

Charly got the best deal because the unit cost per item is less than that of the friend

3 0
3 years ago
Lan Ventor designs a new board game and offers the design to Paddington Games p.l.c.
Andrej [43]

In order to make the offer attractive such that it would earn £25,000 for Ian Vector, Paddington Games would have to sell 460 games.

The game can be sold for £25,000 or for £2,000 and then a fee of £50 for every game sold.

In order for the amount to be the same, the amount from games sold will have to equal the difference between the £25,000 and the £2,000.

Difference is:

= 25,000 - 2,000

= £23,000

The <u>number of games to be sold</u> is:

= Difference / Amount per game

= 23,000 / 50

= 460 games

In conclusion, 460 games need to be sold to make the offer attractive.

<em>Find out more at brainly.com/question/2865277.</em>

5 0
1 year ago
It takes 12 men 8 days to construct a wooden shed. How many days will 15 men take?
Fynjy0 [20]

Answer:

10 days.

Step-by-step explanation:

8÷12 (because you can not divide people.

.666

take that and multiply it by 15

you will get 10

6 0
3 years ago
Other questions:
  • What is the value of x
    6·1 answer
  • A doctor ordered a patient to exercise. The patient ealked for 147 minutes in 2 weeks. The ratio of the time for the first week
    15·1 answer
  • 4. Find the center and the radius of the circle which circumscribes the triangle with vertices ai, a, a3. Express the result in
    15·1 answer
  • Use matrices to determine the vertices of the reflected figure. Then graph the image and the pre-image on the same coordinate gr
    7·1 answer
  • Can someone please match the terms to the right definition.
    10·1 answer
  • I don't really know how to do this.​
    12·1 answer
  • x and x+1 are the two continuous natural numbers, then (i) Write the next two natural numbers. (ii) Find the product of first an
    15·2 answers
  • What is 4 - 2x = 10?
    13·2 answers
  • Solve -4x – 8y = -48<br> 8x + 3y = -34.
    15·1 answer
  • What is 2.3, 2.2031, 2.23, 1.426 from least to greatest?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!