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3 years ago

PLZ HELP ill GIVE BRAINIESt!!!!20 Points

Mathematics

1 answer:

shepuryov [24]3 years ago

3 0

She made her mistake at the first step. To simplify a radical, you would find two numbers that multiply by each other to get your original number (under the radical) and have one of the number be a perfect square.

Her reasoning is wrong because 10*10 is not $\sqrt{50}$ . Had she been correct, her answer should have been able to be squared to equal $\sqrt{50}$

In other words, she should have done $\sqrt{25*2}= \sqrt{25} * \sqrt{2}=5 \sqrt{2}$
(We used 25 because 25 is a perfect square, 5*5=25).

:)

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How do u find x? Please explain

Nonamiya [84]

When the number is directly beside a variable (x), you have to multiply the number and variable

8 0

4 years ago

PLZ answer quick i will give brainliest if right no explanation needed Joe is responsible for reserving hotel rooms for a compan

xxMikexx [17]

Answer:

16 + 8b ≥ 50

4500

Step-by-step explanation:

He needs at least 50 rooms and has already reserved 16

They are in groups of 8

16 + 8b ≥ 50

Subtract 16 from each side

16+8b-16 ≥ 50 -16

8b≥ 34

Divide by 6

8b/8 ≥ 34/8

b≥ 4.25

We need to round up since we need at least 50

b = 5 since we want the least amount of rooms

Each block is 900

5*900 = 4500 more that he will have to spend

8 0

3 years ago

Read 2 more answers

Read the problem below and find the solution.

dybincka [34]

Answer:

440 ft

Step-by-step explanation:

<u>Ball dropped and we start count from that moment:</u>

160 ft down
80 ft up and down
40 ft up and down
20 ft up and down, end

<u>Total distance:</u>

160 + 80*2 + 40*2 + 20*2 = 440 ft

7 0

3 years ago

How do you answer this?

gulaghasi [49]

Answer:

75.7°

Step-by-step explanation:

The mnemonic SOH CAH TOA is intended to remind you of the relations between trig functions and sides of a right triangle. You are given all three sides of the triangle, so you can make use of at least two different trig functions to find the missing angle.

Cos = Adjacent/Hypotenuse

Tan = Opposite/Adjacent

<h3>cosine</h3>

The hypotenuse is 65, and the side adjacent to the unknown angle is 16. That tells you ...

cos(?) = 16/65

The inverse function is used to find the angle value:

? = arccos(16/65) ≈ 75.7°

<h3>tangent</h3>

The side opposite the angle of interest is 63. Then you have ...

tan(?) = 63/16

The inverse function is used to find the angle value:

? = arctan(63/16) ≈ 75.7°

_____

<em>Additional comments</em>

When using trig functions on a calculator, you need to make sure the angle mode is set to what you want. Here, we want angles in degrees, so we have set that as the angle mode. The [DEG] icon in the lower left corner of the display confirms this.

We can't tell what you're supposed to round the value to. The attachment gives enough digits for you to be able to round to whatever precision you need.

5 0

2 years ago

Frankie factored the expression ls 14m + 21pm - 35mq as 7(2m + 3pm - 5mq) . She thinks she has factored out the greatest common

shtirl [24]

Answer:

Disagree, as m is common to all terms of the expression and thus, can be factored. The factored expression is 7m(2 + 3p - 5q)

Step-by-step explanation:

If a variable is common to all terms of an expression, it can be factored.

14m + 21pm - 35mq

Here, m is common to all terms of the expression, so the factored expression is:

$7m(\frac{14m}{7m} + \frac{21pm}{7m} - \frac{35mq}{7m}) = 7m(2 + 3p - 5q)$

Disagree, as m is common to all terms of the expression and thus, can be factored. The factored expression is 7m(2 + 3p - 5q)

7 0

3 years ago