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2 years ago

:) Answer fast if you can

Mathematics

2 answers:

Oksana_A [137]2 years ago

6 0

Answer is B according to distributive property.

Ilya [14]2 years ago

3 0

Answer:

The answer is B

Step-by-step explanation:

Hope it helps

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In the diagram, JKLM∼EFGH. Find the scale factor of EFGH to JKLM

mote1985 [20]

The answer is k= 2.5

Explanation: Rotating the shape will show that one side is 20:8. Divide these together and you get 2.5.

Hope this helps

5 0

3 years ago

Kym switched cell phone plans. She signed up for a new plan that will save her $3.50 per month compared to her old cell phone pl

Alexandra [31]

Answer:

Hi there,

$294 per year = $24.50 per month

Kim paid $24.50 + $3.50 = $28 per

month with her old phone plan.

Hope this helps :-)

Step-by-step explanation:

5 0

3 years ago

Mara simplifies the expression: -(7x - 3y) + 2(x + 4). Her work is shown. In what step does she make a mistake?

likoan [24]

Correct steps are shown

Correct simplified expression is:

$-(7x - 3y) + 2(x+4) = -5x + 3y+8$

Solution:

Given that: Mara simplifies the expression

$-(7x - 3y) + 2(x+4)$

Correct steps are:

From given,

$-(7x - 3y) + 2(x+4)$

Use the distributive property,

a(b + c) = ab + bc

Therefore,

$-(7x - 3y) + 2(x+4) = -7x +3y + 2x + 8$

Group the like terms

$-(7x - 3y) + 2(x+4) = -7x + 2x + 3y + 8\\\\Combine\ the\ like\ terms\\\\-(7x - 3y) + 2(x+4) = -5x + 3y+8$

Thus the expression is simplified

8 0

3 years ago

Determine the number of real solutions each quadratic equation has

Serjik [45]

Answer:

where is your quadratic equation

Step-by-step explanation:

b^2-4ac>0=2 real # solutions

b^2-4ac=0=1 real # solutions

b^2-4ac<0=0 real # solutions

8 0

3 years ago

50 question true-false final exam (two-points each question) and you never paid attention in the class (or knew anything about t

DanielleElmas [232]

Title:

<h2>Check the explanation.</h2>

Step-by-step explanation:

As all the questions of the exam carry 2 points, at least $\frac{56}{2} = 28$ questions need to be correct to get 56 marks.

In order to get a maximum of 56 marks, at most 28 answers needs to be correct.

Every question has two option. Hence, the probability of getting a particular question right is $\frac{1}{2}$ .

The probability that exactly n questions will be right is $^{50}C_n (\frac{1}{2} )^n (\frac{1}{2} )^{50 - n} = ^{50}C_n (\frac{1}{2} )^{50}$ .

The probability that at most 28 questions will be right is ∑ $^{50}C_n (\frac{1}{2} )^{50}$ , $0\leq n\leq 28$ .

Similarly, the probability that at least 30 questions will be right is ∑ $^{50}C_n (\frac{1}{2} )^{50}$ , $30\leq n \leq 50$ .

3 0

3 years ago