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2 years ago

I needs help on algibra

Mathematics

2 answers:

grigory [225]2 years ago

4 0

Answer:

Step 1) She should have added 25 to each side

Step-by-step explanation:

Since there is a -25 in the original equation, to properly cancel it out, she should have added it to both side, not subtracted. This would ensure that the -25 on the left of the = is cancelled out.

suter [353]2 years ago

4 0

9514 1404 393

Answer:

Step 1: She should have added 25

Step-by-step explanation:

The second step shows that Erica wanted the result that -25 would disappear from the left side of the equation. However, by subtracting 25, she would end up with -5x - 50 on the left.

To make the sum of -25 and some number be zero, the added number must be the opposite of -25. That is, 25 must be added (to both sides).

In the attachment, the sum in the red rectangle is -50, not 0.

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A box contains 35 gems, of which 10 are real diamonds and 25 are fake diamonds. Gems are randomly taken out of the box, one at a

Sonja [21]

Answer:

Step-by-step explanation:

The total number of ways of selecting 3 gems of any kind without replacement is 35 * 34 * 33 = 39270

Now selecting 2 gems from 25 is 25C2

25 C 2 = 25 * 24/2 = 300

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Total selection = 300 * 10 = 3000

P(gems) = 3000 / 39270

P(gems) = 300/3927

P(gems) = 100/1309

6 0

2 years ago

Doug is in line at the store. He has three items that cost $4.50, $3.05, and $1.50. Explain how Doug can add the cost of th

Angelina_Jolie [31]

Answer:

He can add through calculater or by doing addition in his mind

4 0

3 years ago

Read 2 more answers

Find missing angle.

Vsevolod [243]

I don’t really know exactly to what degree you need to put in your solution. But I rounded to the nearest tenth degree.
A = 112 degrees
B= 28 degrees (180-112-40 bc all sides of a triangle must equal 180)
C= 40
a= 27.6 (this is the side opposite of angle A)
b= 14 (side opposite b)
c= 19.2 (side opposite c)

HOW TO SOLVE:
c= law of sines, so c/sin(40) = 14/sin(28), multiply both sides by sin(40) so c can be isolated and solved for. c = 14sin(40)/sin(28). Plug into calculator then get answer. c is approximately 19.2.
a = law of sines again, so a/sin(112) = 14/sin(28). Multiply both sides again by sin(112) then solve. a = 14sin(112)/sin(28). Calculator again. a is around 27.6

7 0

3 years ago

Luke is 5 years younger than 3 times in Sydney's age in the situation what does 3s represnt

Fudgin [204]

3s is 3 times sydneys age. so the equation would be 3s-5

8 0

3 years ago

Please help ASAP thank u!! :))

frozen [14]

Answer:

Use your brain

Step-by-step explanation:

6 0

3 years ago