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nlexa [21]
3 years ago
11

PLEASE HELP I'M BAD AT MATH I'LL MAKE BRAINLEIST!!!!!!!​

Mathematics
1 answer:
Maurinko [17]3 years ago
5 0
The answer to that question is 0.5
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Find - 7.8 + (- 12) + (-82.3).<br> O 102.1<br> O – 102.1<br> 0 -91.3<br> O-62.5
Fantom [35]

Answer:

-102.1

Step-by-step explanation:

When adding negative numbers, act as if you are subtracting that same number, but in its positive form.

So in reality, you could rewrite the equation as: (-7.8) - 12 - 82.3 = -102.1

7 0
2 years ago
Jamal and keisha went running keisha ran 2 miles more than jamal if keisha ran 8 miles how many miles did jamal run
kati45 [8]
Jamal would have run 10 miles
5 0
3 years ago
A tree 6m high casts a shadow 4m long. What angle do the sun's rays make with the ground?​
Usimov [2.4K]

Answer:

tan x° = 56.31°

Step-by-step explanation:

6/4= 1.5

hence x° = 56.31

7 0
3 years ago
A professor pays 25 cents for each blackboard error made in lecture to the student who pointsout the error. In a career ofnyears
arsen [322]

Answer:

The correct answer is "0.0000039110".

Step-by-step explanation:

The given values are:

Y_n\rightarrow N(\mu, \sigma^2)

\mu = 40n

\sigma^2=100n

n=20

then,

The required probability will be:

= P(Y_{20}>1000)

= P(\frac{Y_{20}-\mu}{\sigma} >\frac{1000-40\times 20}{\sqrt{100\times 20} } )

= P(Z>\frac{1000-800}{44.7214} )

= P(Z>\frac{200}{44.7214} )

= P(Z>4.47)

By using the table, we get

= 0.0000039110

6 0
3 years ago
Write x^2 + 6x -7 in the form (x+a)^2 +b where a and b are integers please
ANTONII [103]

Answer:

(x + 3) {}^{2}  - 16

Step-by-step explanation:

{x}^{2}  + 6x - 7 = (x  + 3)  {}^{2}  - (3) {}^{2}  - 7 \\  = (x + 3) {}^{2}  - 16

3 0
3 years ago
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