2 years ago

Select the correct answer from each drop-down menu,

Mathematics

2 answers:

alexira [117]2 years ago

8 0

Answer:

same and 3

Step-by-step explanation:

I took test

Nadusha1986 [10]2 years ago

5 0

Answer:

sos

Step-by-step explanation:

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f 4 adult females are randomly selected, find the probability that they have pulse rates with a mean less than 81 beats per min

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The answer is 0.9726

Step-by-step explanation:

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2 years ago

A flower bed has the shape of a rectangle 5 yards long and 4 yards wide. What is its area in square feet?

aalyn [17]

To find the area, use A= bh (base x height), or A = lw (length x width)

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3 x 5 = 15
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Ehich of thr following expressions has a Simplified value of 3A -2?

LenaWriter [7]

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2 years ago

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3 years ago

How many solutions does the system have? \begin{cases} 3x+y=8 \\\\ 2x+2y=8 \end{cases} ⎩ ⎪ ⎪ ⎨ ⎪ ⎪ ⎧ 3x+y=8 2x+2y=8 Choose 1

ELEN [110]

Answer:

This system has one solution (x=2 and y=2), then the answer is A.

Step-by-step explanation:

The system of equations is:

$3x+y=8$ (1)

$2x+2y=8$ (2)

Let's multiply the first equation by 2 and subtract it to the second equation

$6x-2x+2y-2y=16-8$

$4x=8$

$x=2$

Using this value in (1) we can find y.

$3(2)+y=8$

$6+y=8$

$y=2$

Therefore, this system has one solution (x=2 and y=2), the answer is A.

I hope it helps you!

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2 years ago