3 years ago

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

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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

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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

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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

= $0.0000039110$

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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

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

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