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
Yuliya22 [10]
3 years ago
9

Help please help!! my grade is down​

Mathematics
1 answer:
lisov135 [29]3 years ago
7 0

plug in -2 for x

7*-2 -10 = -24

You might be interested in
What are the roots of the polynomial equation
rosijanka [135]

Answer:

-4 or -3

Step-by-step explanation:

Calculate the determinant:

D = b^2 - 4ac = 49 - 48 = 1

Apply the formula:

x = (-b +- sqrt(D))/2a = (-7 +- 1)/2 = -4 or -3

7 0
2 years ago
A boat traveled 280 miles downstream and back. The trip downstream took 7 hours. The trip back took 14 hours. Find the speed of
katrin2010 [14]
Downstream 280mi/7 hours
(Speed =change in position/change in time)
40mi/hr
Back
280/14
20mi/hr
5 0
3 years ago
100 Points!
tester [92]

Part A: x = -5/4, 3 || (-5/4, 0) (3, 0)

To find the x-intercepts, we need to know where y is equal to 0. So, we will set the function equal to 0 and solve for x.

4x^2 - 7x - 15 = 0

4 x 15 = 60 || -12 x 5 = 60 || -12 + 5 = -7

4x^2 - 12x + 5x - 15 = 0

4x(x - 3) + 5(x - 3) = 0

(4x + 5)(x - 3) = 0

4x + 5 = 0

x = -5/4

x - 3 = 0

x = 3

Part B: minimum, (7/8, -289/16)

The vertex of the graph will be a minimum. This is because the parabola is positive, meaning that it opens to the top.

To find the coordinates of the parabola, we start with the x-coordinate. The x-coordinate can be found using the equation -b/2a.

b = -7

a = 4

x = -(-7) / 2(4) = 7/8

Now that we know the x-value, we can plug it into the function and solve for the y-value.

y = 4(7/8)^2 - 7(7/8) - 15

y = 4(49/64) - 49/8 - 15

y = 196/64 - 392/64 - 960/64

y = -1156/64 = -289/16 = -18 1/16

Part C:

First, start by graphing the vertex. Then, use the x-intercepts and graph those. At this point we should have three points in a sort of triangle shape. If we did it right, each of the x-values will be an equal distance from the vertex. After we have those points graphed, it is time to draw in the parabola. Knowing that the parabola is positive, we draw in a U shape that passes through each of the three points and opens toward the top of the coordinate grid.

Hope this helps!

6 0
2 years ago
Elaine has three types of nuts, peanuts, cashews and almonds, that she combines and stores in a large container: There are three
wlad13 [49]

Answer:

There are 9 ounces of peanuts

Make the ounces of cashews equal to three, and this works! Don’t know the math otherwise :|

8 0
2 years ago
Eight minus the quotient of two and a number x
Tema [17]
8 - (2 / x)

/ = division 


5 0
3 years ago
Read 2 more answers
Other questions:
  • Instruction: You must show all of your work bysl setting up the problem using combinatorics and simplifying completely.
    7·1 answer
  • Mrs.Conley can type 3 pages in one hour. How many hours will it take her to type a 123 page paper
    5·1 answer
  • Which is the value of y in system of equations 4x-5y=18 <br>8x+y=58
    13·1 answer
  • Roberto will save 1/6 of his allowance each day. If he gets $2.00 a day, about how much money will he save each day? Round your
    5·1 answer
  • PLEASE HELP ME WITH THIS THANKS
    8·2 answers
  • DIVIDING RATIONAL EXPRESSIONS
    12·1 answer
  • Which is the graph of the linear inequality y &lt; 3x + 1?
    13·1 answer
  • Please help asap its timed ( 28 points)
    10·2 answers
  • Question in pictures for quadratics
    7·1 answer
  • Write the set by listing its elements.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!