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TEA [102]
2 years ago
5

I need help please...

Mathematics
2 answers:
vesna_86 [32]2 years ago
7 0

Answer:

(21.89 - 20)/ 21.89 × 100%

Step-by-step explanation:

See above

Semenov [28]2 years ago
6 0

Answer:

i believe the answer is 1.8% tax

Step-by-step explanation:

hope this helps <3

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Write an inequality to represent the graph.
Westkost [7]

Answer:

y ≥ −4x − 2

Step-by-step explanation:

8 0
3 years ago
Sixty-three less than 15 times a number is 72. what is the number?
exis [7]

Answer:

-3/5

Step-by-step explanation:

First represent this with numbers. Less means subtraction -, times means multiplication *, is means equals =.

And let's represent "a number" with x.

63 - 15x = 72

Solve for x. First subtract 63 from both sides.

-15x = 72-63

-15x = 9

x = -9/15 = <u>-3/5</u>

7 0
3 years ago
Read 2 more answers
Which equation shows the substitution method being used to solv the system of equations?
slava [35]
The x value in the second equation (y+2) is substituted for the x in the first equation in...

Answer A.
8 0
3 years ago
An urn contains two blue balls (denoted B1 and B2) and three white balls (denoted W1, W2, and W3). One ball is drawn from the ur
Serhud [2]

Answer:

(a)\dfrac{2}{5}

(b)\dfrac{9}{25}

Step-by-step explanation:

An urn contains two blue balls (denoted B_1 \:and\: B_2) and three white balls (denoted W_1, W_2 \:and\: W_3).

In the selection, a ball is picked and replaced.

From the attached probability tree, the possible outcomes are:

B_1B_1,B_1B_2,B_1W_1,B_1W_2,B_1W_3\\B_2B_1,B_2B_2,B_2W_1,B_2W_2,B_2W_3\\W_1B_1,W_1B_2,W_1W_1,W_1W_2,W_1W_3\\W_2B_1,W_2B_2,W_2W_1,W_2W_2,W_2W_3\\W_3B_1,W_3B_2,W_3W_1,W_3W_2,W_3W_3

(a)If the first ball drawn is blue

Number of Outcomes =10

The probability that the first ball drawn is blue =\dfrac{10}{25}= \dfrac{2}{5}

(b)If only white balls are drawn

Number of Outcomes =9

Probability that only white balls are drawn =\dfrac{9}{25}

3 0
3 years ago
A surveyor finds that the face of a pyramid makes an angle of 135° with the ground, as shown. From a point 100 meters from the b
lara [203]
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.

Below are the choices that can be found from other source:

a. Law of Sines: XY/sin 25º = 100/sin 135º 
<span>b. Law of Cosines: (XY)2 = (100)2 + (135)2 - 2(100)(XY)(cos 25º) </span>
<span>c. Law of Cosines: (100)2 = (XY)2 + (135)2 - 2(100)(135)(cos 25º) </span>
<span>d. Law of Sines: XY/sin 25º = 100/sin 20º 
</span>
The answer is D
3 0
2 years ago
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