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
alexdok [17]
3 years ago
15

The area of a trapezoid is found using the formula

Mathematics
1 answer:
soldier1979 [14.2K]3 years ago
6 0

Answer:

B. 18

Step-by-step explanation:

Area of a trapezoid is  [(base 1 + base 2)*height]/2.

Area =[(5 + 7)*3]/2 = 12*3/2 = 18 km²

You might be interested in
Please help meee!!! 5 stars to the best answer.
vovikov84 [41]

Answer:

3 cm

Step-by-step explanation:

First, find the volume of the cone.

V = \frac{1}{3}\pir²h

V = \frac{1}{3}(3.14)(9)(12)

V = 113.04

This means the sphere is also 113.04

Use the formula V = \frac{4}{3}\pir³

113.04 = \frac{4}{3}(3.14)r³

113.04 = 4.19r³

26.98 = r³

3 ≈ r

6 0
4 years ago
Read 2 more answers
3x^2+6x-9=0 complete the square
PolarNik [594]
You could simplify this work by factoring "3" out of all four terms, as follows:

3(x^2 + 2x - 3) =3(0) = 0

Hold the 3 for later re-insertion.  Focus on "completing the square" of x^2 + 2x - 3.

1.  Take the coefficient (2) of x and halve it:  2 divided by 2 is 1
2.   Square this result:  1^2 = 1
3.   Add this result (1) to x^2 + 2x, holding the "-3" for later:
                    x^2 +2x 
4    Subtract (1) from x^2 + 2x + 1:     x^2 + 2x + 1               -3 -1  =    0, 
       or      x^2 + 2x + 1 - 4 = 0
5.   Simplify, remembering that x^2 + 2x + 1 is a perfect square:

                        (x+1)^2 - 4 = 0

We have "completed the square."  We can stop here.  or, we could solve for x:  one way would be to factor the left side:

            [(x+1)-2][(x+1)+2]=0     The solutions would then be:

             x+1-2=0=> x-1=0, or x=1, and
             x+1 +2 = 0 => x+3=0, or x=-3.  (you were not asked to do this).


3 0
3 years ago
(2,?) is on the line x + 3 = y. Find the other half of the coordinate.
Brut [27]
Sub in 2 for x and solve for y

x + 3 = y
2 + 3 = y
5 = y

so ur points are : (2,5)
4 0
3 years ago
Read 2 more answers
Find the unit rate. Round to the nearest hundredth, if necessary.<br><br> $5.99 for 19 lb
sveta [45]

Answer:

0.315 per lb

Step-by-step explanation:

5 0
3 years ago
Solve -5x2 - 20x + 35 = 30 by completing the square.
Semenov [28]

Answer:

x=−2−√5 or x=−2+√5

Step-by-step explanation:

-5x2 - 20x + 35 = 30

Answer = x=−2−√5 or x=−2+√5

5 0
3 years ago
Other questions:
  • Which amount is layer 3/5 or .41 and why
    13·1 answer
  • Darcy harvest 8 3/4 acres of corn every 5/6 of an hour. How many acres per hour?
    6·1 answer
  • Guysss I need help. What's the degree of a 90 degree angle
    11·2 answers
  • 1000÷0.833......................................​
    13·1 answer
  • The mean of six numbers is 45. Four of the numbers are 40, 38, 46, and 51. If the remaining two numbers are I. The ratio of 2:3,
    14·1 answer
  • 2. George worked 40 regular hours and 5 overtime hours this week. If his regular pay is $14 per
    15·1 answer
  • Im so confused can someone help please
    12·1 answer
  • The school needs to purchase a new refrigerator for student rewards. Lowes and Scars have the model
    12·1 answer
  • Tn=n²−n+4<br><br> whtatagtaatta
    12·1 answer
  • If 500’ roll of wire costs 18.44 what I’d the first of wire per foot
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!