6. which of the following is a water ontaminant that can cause acid mine
drainage
a flux
c. methane
d. sulfuric acid
b. carbon dioxide
7. subsidence can result from the collapse of
quarrie
e. rocks that once held minerals.
d. placer deposits.
b. pillars i
8. surface
ng can cause
4. only air pollution.
b. only noise pollution.
c. both air and noise pollut
d. neither air nor noise pollut
9. which of the follow ng is not a regu
mining companies must
follow?
a. the clean water act
b. the hazardous products act
c. the safe d drinking w ater act
d. the endangered species act
10. what can contan
ate a river as a result of dredging?
a. potash
c. placer deposits
d. muddy sediments
b. seawater
mirnia
(dougal envi
ental science
mining and mineral res

x = 7

step-by-step explanation:

equating the expression for area to the given area

2x² - 7x - 4 = 45 ( subtract 45 from both sides )

2x² - 7x - 49 = 0 ← in standard form

to factor consider the factors of the product of the coefficient of the x² term and the constant term which sum to give the coefficient of the x- term

product = 2 × - 49 = - 98 and sum = - 7

the factors are - 14 and + 7

use these factors to split the middle term

2x² - 14x + 7x - 49 = 0 ( factor the first/second and third/fourth terms )

2x(x - 7) + 7(x - 7) = 0 ← factor out (x - 7)

(x - 7)(2x + 7) = 0

equate each factor to zero and solve for x

x - 7 = 0 ⇒ x = 7

2x + 7 = 0 ⇒ 2x = - 7 ⇒ x = -

thus the positive value for x is x = 7

true

explanation:

agreeableness is a personality trait manifesting itself in individual behavioral characteristics that are perceived as kind, sympathetic, cooperative, warm, and considerate.

1.new zealand has a large temperate climate while for north has subtropical weather during summer.

i can only answer one

answer; membership group;