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
guapka [62]
3 years ago
6

PLEASE HELP!!!!

Mathematics
1 answer:
juin [17]3 years ago
4 0

\displaystyle \sum_{n=1}^{5} (-5 -4(n-1))

\displaystyle =\sum_{n=1}^{5} (-1-4n)

Answer: the summation from n equals one to 5 of quantity negative 1 minus 4 times n

You might be interested in
These are the fees for sending a package by Media Mail: $2.41 for the first pound $0.41 per additional pound for the next six po
den301095 [7]
2.41+6(0.41)+(lb-7)0.39=7.99

2.41+2.46-2.73+0.39lb=7.99

0.39lb=5.85

lb=15

The package of books weights 15 pounds...
3 0
3 years ago
PLEASE HELP! Here's my word problem; A rectangular riding arena is 45 meters long. The stables are 10 meters wide and 26.6 meter
Pavlova-9 [17]

Answer:

38

Step-by-step explanation:

fggfhghghj

7 0
3 years ago
Brandon buys a radio for $45.09 in a state where the sales tax is 7%. How much does he pay in taxes? If necessary round to the n
dusya [7]

Answer:

Step-by-step explanation:

tax = 7% of $45.09 = 0.07×$45.09 ≅ $3.16

Total cost = $45.09 + $3.16 = $48.25

5 0
2 years ago
PLEASE please need help
solniwko [45]
3 is 93 and 4 is -18 i hope this helped
3 0
2 years ago
Read 2 more answers
A tunnel is built in form of a parabola. The width at the base of tunnel is 7 m. On
anastassius [24]

Given:

The width at the base of parabolic tunnel is 7 m.

The ceiling 3 m from each end of the base there are light fixtures.

The height to light fixtures is 4 m.

To find:

Whether it is possible a trailer truck carrying cars is 4 m wide and 2.8 m high is going to drive through the tunnel.

Solution:

The width at the base of tunnel is 7 m.

Let the graph of the parabola intersect the x-axis at x=0 and x=7. It means x and (x-7) are the factors of the height function.

The function of height is:

h(x)=ax(x-7)             ...(i)

Where, a is a constant.

The ceiling 3 m from each end of the base there are light fixtures and the height to light fixtures is 4 m. It means the graph of height function passes through the point (3,4).

Putting x=3 and h(x)=4 in (i), we get

4=a(3)((3)-7)

4=a(3)(-4)

\dfrac{4}{(3)(-4)}=a

-\dfrac{1}{3}=a

Putting a=-\dfrac{1}{3}, we get

h(x)=-\dfrac{1}{3}x(x-7)              ...(ii)

The center of the parabola is the midpoint of 0 and 7, i.e., 3.

The width of the truck is 4 m. If is passes through the center then the truck must m 2 m on the left side of the center and 2 m on the right side of the center.

2 m on the left side of the center is x=1.5.

A trailer truck carrying cars is 4 m wide and 2.8 m high is going to drive through the tunnel is possible if h(1.5) is greater than 2.8.

Putting x=1.5 in (ii), we get

h(1.5)=-\dfrac{1}{3}(1.5)(1.5-7)

h(1.5)=-(0.5)(-5.5)

h(1.5)=2.75

It is clear that h(1.5)<2.8, therefore the trailer truck carrying cars is 4 m wide and 2.8 m high is going to drive through the tunnel is not possible.

4 0
3 years ago
Other questions:
  • PLEASE HURRY my question is in the picture​
    8·2 answers
  • Pls help! will mark brainliest if you can answer correctly
    14·2 answers
  • On the following composite figure, all angles are right angles. All short edges of the figure have a measure of 1.5 centimeters.
    13·1 answer
  • 3x2 + 24x = 0 for x.
    9·2 answers
  • Help me please for brainliest!
    13·2 answers
  • Find the volume of the sphere
    7·1 answer
  • QUICK QUICK QUICK<br> What is the solution set for this inequality? <br><br> - 6x + 30 &gt; - 12
    11·2 answers
  • A teacher graded s 27 tests in 3 hours. Do these quantities(number of tests graded in time) vary directly or inversely? Explain.
    8·1 answer
  • HELP ASAP OFFERING 13 points
    6·2 answers
  • What is 56 ÷ (-8) = ___ need fast will give brainliest
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!