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3 years ago

Use the distributive property to multiply. -(-16m-1)

Mathematics

1 answer:

Pepsi [2]3 years ago

8 0

Answer:

16m+1

Step-by-step explanation:

Knowing about our proprieties about parentheses and negatives, let's solve this out.

A negative multiplied by a negative give you a positive

therefore....

-(-16m-1)= 16m+1

The -1 also receives the negative because the problem was in a parentheses :)

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Solve the equation. 4+ 14 = – 2(7x-9)

Tamiku [17]

Answer:

-63

Step-by-step explanation:

4 0

3 years ago

snow_tiger [21]

Answer:

12 combinations

Step-by-step explanation:

7 0

3 years ago

I need help on this ASAP pls 20 points

Semenov [28]

Answer:

1070cm2

Step-by-step explanation:

the cereal box represents a cuboid and it is closed hence a closed cuboid.

SA- Surface area

L- Length = 15

W- Width =4

H- Height =25

In a closed cuboid, there are going to be 6 faces( 3 pairs).

To find SA, we have to take the area of all faces and sum them up.

You can do this by carrying out the area of all faces and summing them up or you can use the formula:

SA of a closed cuboid=2(L x W) + 2(W x H) + 2(L x H)

= 2(15 x 4) + 2(4 x 25) + 2(15 x 25)

= 2(60) + 2(100) + 2(375)

=120 + 200 + 750

=1070cm2

4 0

3 years ago

At work, Chris used 117 inches of tape to seal 9 boxes for shipping. The equation

RoseWind [281]

The right answer is Option B.

Step-by-step explanation:

According to given statement;

$\frac{x}{15}=\frac{117}{9}\\Multiplying\ both\ sides\ by\ 15\\15*\frac{x}{15}=\frac{117}{9}*15\\\frac{15x}{15}=\frac{1755}{9}\\x=195$

Chris will require 195 inches of tape to seal 15 boxes.

The right answer is Option B.

Keywords: Multiplication, Division

Learn more about division at:

#LearnwithBrainly

3 0

3 years ago

Military radar and missile detection systems are designed to warn a coutry of an enemy attack. Assume that a particular detectio

Tom [10]

Answer:

0.96 = 96% probability that at least one of them detect an enemy attack.

Step-by-step explanation:

For each radar, there are only two possible outcomes. Either it detects the attack, or it does not. The missiles are operated independently, which means that we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

Assume that a particular detection system has a 0.80 probability of detecting a missile attack.

This means that $p = 0.8$

If two military radars are installed in two different areas and they operate independently, the probability that at least one of them detect an enemy attack is

This is $P(X \geq 1)$ when $n = 2$ . So

$P(X \geq 1) = 1 - P(X = 0)$

In which

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 0) = C_{2,0}.(0.8)^{0}.(0.2)^{2} = 0.04$

$P(X \geq 1) = 1 - P(X = 0) = 1 - 0.04 = 0.96$

0.96 = 96% probability that at least one of them detect an enemy attack.

6 0

3 years ago