Talia is finding the lateral area of the pyramid. She says that the expression
ən 4 [ 3 2Y8.9)
(8)(6.9)
represents the lateral area. Which
explains whether Talia is correct and why?
Talia is correct. The three faces have the same area as the base, and the area of the base is (8)(6.9).
Tala is correct. The lateral area can be found by approximating one large triangle, which can be found using the
(3
Tala is not correct. On the base has an area of 3(e)(8 9), and three other faces have a different area
Tala is not correctThe area has three faces, so the expression should be
(3core 9)

step-by-step explanation:

first, eliminate the parenthesis:

3

x

+

2

−

4

x

second, group like terms:

3

x

−

4

x

+

2

third, combine like terms:

(

3

−

4

)

x

+

2

→

−

1

x

+

2

→

−

x

+

2

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

answer: 193

explanation:

200-7 = 193

x = -5

step-by-step explanation: