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3 years ago

Consider the following expression -2m(m+n-4)+5(-2m+2n)+n(m+4n-5) which of the following is an equivalent expression

Mathematics

1 answer:

velikii [3]3 years ago

3 0

The answer is:

-2m²+4n²-mn-2m+5n

aka letter c in algebra nation

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Please help me if can, tysm

Gelneren [198K]

Square root of 4096 is 6.4 so the answer is 64 + 6.4 = 70.4.

8 0

3 years ago

Read 2 more answers

Altogether Central High School's bands have 40 trumpets and 35 tubas. Carlee says the ratio of trumpets to tubas is 40:35. Danny

inna [77]

Answer:

Explanation is given below.

Step-by-step explanation:

Given:

Number of Trumpets = 40

Number of tubas = 35

Carlee says, the ratio of trumpets to tubas = 40 : 35

Danny says, the ratio of trumpets to tubas = 8 : 7

To explain why the two ratios are equivalent.

Solution:

Equivalent ratios are all ratios which are equal to each other in their reduced to simplest form.

The ratio of trumpets to tubas can be given as = $\frac{40}{35}$

To reduce the ratio to its simplest form, we divide both numbers by their G.C.F.

The G.C.F. for 40 and 35 is 5.

So, we divide numerator and denominator by 5.

⇒ $\frac{40\div5}{35\div 5}$

⇒ $\frac{8}{7}$

Thus, the simplest ratio of trumpets to tubas can be given as = 8:7

This is why both Danny and Carlee are correct with the ratios of trumpets to tubas.

Carlee gave the direct ratio, while Danny gave the simplest ratio.

5 0

4 years ago

What is the value for B, after the equation cap a equals start fraction three over seven end fraction left parenthesis cap b min

r-ruslan [8.4K]

Answer:

$B = \frac{7}{3}A + 25$

Explanation:

The given equation is:

$A = \frac{3}{7} (B-25)$

To get the value of B, we will need to isolate it on one side of the equation

This is done as follows:

$A = \frac{3}{7} (B-25)$

1- Multiply both sides by $\frac{7}{3}$ to get rid of the fraction:

$\frac{7}{3}A = B - 25$

2- Add 25 to both sides of the equation:

$\frac{7}{3} A + 25 = B$

Based on the above:

$B = \frac{7}{3}A + 25$

Hope this helps :)

3 0

3 years ago

The probability that a person in the United States has type B+ blood is 13%.

blondinia [14]

Answer:

Step-by-step explanation:

Given that the probability that a person in the United States has type B+ blood is 13%.

Since four unrelated people in the United States are selected at random, we can say that each person is independent of the other to have B+ blood group.

Let X be the number of persons who have blood group B+ in the group of 4 persons.

X is Binomial with p = 0.13

a) P(X = 4) = $(0.13)^4 = 0.000286$

b) P(x =0) = $(1-0.13)^4 = 0.572898$

c) $P(X\geq 10 = 1-P(0) = 0.427102$

d) All having B+ is unusual since probability is very negligible

3 0

3 years ago

Is this greater than, less than, or equal to

jeka57 [31]

When doing something like this you want to make sure both sides are the same, so turn 7/4 into a percent. 7/4 equals 175, therefore they’re equal to each other.

3 0

3 years ago