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
balu736 [363]
3 years ago
14

Please help!! Evaluate: 1. 5x(x-2)-2x^2 for x=-2 2. 2x^2-5x+8 for x=3

Mathematics
2 answers:
Kryger [21]3 years ago
6 0

Answer:

1. 32.

2. 11.

Step-by-step explanation:

1.   5x(x-2)-2x^2 for x=-2:

= 5(-2)( -2-2)-2(-2)^2

=  -10*-4 - 2*4

= 40-8

= 32.

2. 2x^2-5x+8 for x=3:

= 2(3)^2 -5(3)+8

=  18 - 15 + 8

= 11.

sattari [20]3 years ago
3 0

Answer:

Step-by-step explanation:

1) 5x(x-2)-2x^2 for x =2

= 5(-2)(-2-2) -2(2)^2

= -10(-4) -2(4)

= 40 - 8

= 36

2) 2x^2 - 5 + 8 for x = 3

= 2(3)^2 - 5(3) + 8

= 2(9) -  15 + 8

= 18 -  15 + 8

= 3 + 8

= 11

You might be interested in
Does this scatter plot show a positive trend, a negative trend, or no trend?​
Jobisdone [24]
It shows a negative trend
5 0
3 years ago
Read 2 more answers
Tom has 8 toys each toy weighs either 20 grams or 40 grams or 50 grams he has a diffrent number of toys (at least one) of each w
liberstina [14]

Answer:

110

Step-by-step explanation:

He said he had atleast 1 of each. Hope it helps.

7 0
3 years ago
Read 2 more answers
A Jersey is $35 and is 30% off. How much will you save?<br><br> PLEASE HURRY WITH THE ANSWER !
yanalaym [24]

Answer:

You will save $24.50

Step-by-step explanation:

because 35 x0.3= 10.50, therefore 35 - 10.50=24.50 the answer

4 0
3 years ago
Use 3.14 for r. Round your answers to
galben [10]

Answer:

I think its A........ I don't really know.

Step-by-step explanation:

5 x 2 = 10

3.14 x 10 = 31.4

3 0
3 years ago
A radar gun was used to record the speed of a swimmer (in meters per second) during selected times in the first 2 seconds of a r
Natalka [10]
Trapezoidal is involving averageing the heights
the 4 intervals are
[0,4] and [4,7.2] and [7.2,8.6] and [8.6,9]

the area of each trapezoid is (v(t1)+v(t2))/2 times width

for the first interval
the average between 0 and 0.4 is 0.2
the width is 4
4(0.2)=0.8

2nd
average between 0.4 and 1 is 0.7
width is 3.2
3.2 times 0.7=2.24

3rd
average betwen 1.0 and 1.5 is 1.25
width is 1.4
1.4 times 1.25=1.75

4th
average betwen 1.5 and 2 is 1.75
width is 0.4
0.4 times 1.74=0.7

add them all up
0.8+2.24+1.75+0.7=5.49

5.49
t=time
v(t)=speed
so the area under the curve is distance
covered 5.49 meters
8 0
3 years ago
Other questions:
  • Solve 2x + 9 (x-1) = 8 (2x + 2) - 5
    9·2 answers
  • What is 900000+168763
    6·2 answers
  • The length of a rectangle is 4 inches less than twice its width. If the area of the rectangle is 70 square inches, what are its
    7·1 answer
  • Isi drilled a hole that is 5/9 inch wide.she has a screw that is 5/6 inch wide.is the hole wide enough to fit the screw
    6·1 answer
  • Is 1/5 a rational number
    9·2 answers
  • Can i please get some help asap
    8·1 answer
  • Plz explain how do you know
    14·2 answers
  • Which of these sums is greater than 1?<br><br> A. 12+23<br> B. 13+18<br> C. 14+25<br> D. 15+110
    15·2 answers
  • Click on the name of the figure.<br><br> Help me plz!
    12·2 answers
  • For the following exercises, evaluate the function at the indicated values:
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!