MATHEMATICS HIGH SCHOOL

​ ​ ​ ​​ ​−5y−10x=45 ​−3y+10x=−5
y=
x=

Answers

Answer 1
Answer: Use elimination method (add equations together).

-5y-10x-3y+10x=45-5
-8y=40
y=-5

Plug this value into one of the first equations.

-3(-5)+10x=-5
15+10x=-5
10x=-20
x=-2

Final answer: (-2,-5)
Answer 2
Answer: The answers are -2 and -5

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MIDDLE SCHOOL

Is this statement true 65.023>65.23?

Answers

Answer:

No

Step-by-step explanation:

the first one would be 65 and 23/1000, while the other one is 65 and 23/100

MIDDLE SCHOOL

A bill cost $45.80. They leave a 20% tip. How much should they leave for tip?

Answers

Find 20% of 45.80

0.20 * 45.8 = 9.16

So they should leave $9.16 for the tip.

45.80 multiply by 0.20 equals 9.16
MIDDLE SCHOOL

zahra cuts a loaf of bread into 5 equal pieces she then cuts each piece into 3 equal slices what fraction of the whole loaf is one slice of bread

Answers

One slice of bread would be 1/15
MIDDLE SCHOOL

A box contains 30 radio chips of which 10 are defective. If 7 chips are picked at random out of the box randomly, what is the probability that at least 8 are defective? Needs to show all work.

Answers

Answer the chace is 50%

Step-by-step explanation:

because if you  defined it then simplify it u get 50

Answer my question first

if one ratio is given find all other find sin30+cos30?

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