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
Phantasy [73]
2 years ago
13

I took a picture of my math questions, here take a look.

Mathematics
1 answer:
PtichkaEL [24]2 years ago
7 0
Which one do you want to be awnserd

You might be interested in
How many are 10 x 10 ?​
Hunter-Best [27]

Answer:

100

Step-by-step explanation:

Count to ten ten times and you'll get 100

4 0
3 years ago
8y-10-5y+8=0<br><br> Y=.....
Montano1993 [528]
8y-10-5y+8=o
+10. +10.
8y -5y. +8
3y+8
4 0
3 years ago
13....................
Mashcka [7]

13.

(a)

y=-5x^2+21x-3

for x = 2:

y=-5(2)^2+21(2)-3=-20+42-3=19

for x = 5

y=-5(5)^2+21(5)-3=-125+105-3=-23

(b)

The graph is:

(c)

Using the graph:

\begin{gathered} x=1.8,y=18.6 \\ x=0.548,y=7 \\ x=3.65,y=7 \end{gathered}\begin{gathered} x=1.8 \\ y=-5(1.8)^2+21(1.8)-3=-16.2+37.8-3=18.6 \end{gathered}\begin{gathered} y=7 \\ -5x^2+21x-3=7 \\ -5x^2+21x-10=0 \end{gathered}

Using the quadratic formula:

\begin{gathered} x=\frac{-b\pm\sqrt[]{b^2-4ac}}{2a} \\ x=\frac{-21\pm\sqrt[]{21^2-4(-5)(-10)}}{2(-5)} \\ x=\frac{-21\pm\sqrt[]{241}}{-10} \\ x=0.54758 \\ or \\ x=3.6524 \end{gathered}

6 0
1 year ago
Tim must read 2 books from a list of 7 recommended books for his summer reading program. In how many different ways can Tim choo
Marianna [84]

There are 21 ways Tim choose 2 books from the 7 recommended book

<em><u>Solution:</u></em>

Given that Tim must read 2 books from a list of 7 recommended books for his summer reading program

To find: different ways can Tim choose 2 books from the 7 recommended books

This is a combination problem

A combination is a selection of all or part of a set of objects, without regard to the order in which objects are selected

<em><u>The formula for combinations is:</u></em>

n C_{r}=\frac{n !}{r !(n-r) !}

where n represents the number of items, and r represents the number of items being chosen at a time

Here we have to choose 2 books from 7 books

Therefore, n = 7 and r = 2

<em><u>Substituting values in above formula, we get</u></em>

\begin{aligned}&7 C_{2}=\frac{7 !}{2 !(7-2) !}\\\\&7 C_{2}=\frac{7 !}{2 ! \times 5 !}\end{aligned}

For a number n, the factorial of n can be written as,

n !=n \times(n-1) \times(n-2) \dots \dots \times 2 \times 1

Therefore, we get

7 C_{2}=\frac{7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1}{2 \times 1 \times 5 \times 4 \times 3 \times 2 \times 1}\\\\7C_2 = 7 \times 3 = 21

Thus there are 21 ways Tim choose 2 books from the 7 recommended book

7 0
3 years ago
True or False: Using the formulas A = (bh)/2 and A = 1/2(bh) will get you two completely DIFFERENT answers.
lozanna [386]

Answer:

false they are the same formulas

8 0
2 years ago
Read 2 more answers
Other questions:
  • I need help please ​
    10·1 answer
  • The expression 3 1/2x + 18 represents the perimeter of the rectangle shown. Write an expression that represents the length of th
    11·1 answer
  • Choose the polynomial that is written in standard form.
    15·2 answers
  • What are the advantages and disadvantages to representing a function as an equation instead of a graph
    13·1 answer
  • What are the dimensions of the rectangle shown on the coordinate plane?
    12·1 answer
  • James used 30% of his savings to buy video games. If he had $60 dollars saved. How much does he have left
    12·1 answer
  • Find the length of side a.
    7·2 answers
  • 100 POINTS!!!!!
    13·1 answer
  • On the blue prints for a house, 2 inches represents 3 feet. If the width of a room on
    11·1 answer
  • Which recursive formula can be used to represent the sequence <br>2,6,10,14,18...?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!