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weeeeeb [17]
3 years ago
7

Find the value of a and b

Mathematics
1 answer:
Luba_88 [7]3 years ago
3 0

Answer:

a = 60

b = 60

Step-by-step explanation:

We know that BC is 90°, because of the square thingy.

YB is 30°.

Now we do 180 - 30 - 90 = 60 (180 is the straight angle)

60  = b

Then a is the same.

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30/50 of earth atomospere is made up nitrogen while only 21/100 is made up of oxygen what fraction of earth atmosphere is either
lara31 [8.8K]

Answer:

81/100 of the atmosphere consists of those two elements

Step-by-step explanation:

3/5+21/100  >  81/100

3 0
3 years ago
At the beginning of the week, a puppy weighed 5/14 pounds. During the week, the puppy gains 8 ounces.
Mekhanik [1.2K]

Answer:

51/12

as a mixed number

4 1/4

Step-by-step explanation:

first you add 8 to 4 which is 12

so the improper fraction would be 51/12

how to turn it in to a mixed number in simplest form

step 1 - Find Whole Number

Calculate out how many times the denominator goes into the numerator. To do that, divide 51 by 12 and keep only what is to the left of the decimal point:

51 / 12 = 4.2500 = 4

Step 2 - Find New Numerator

Multiply the answer from Step 1 by the denominator and deduct that from the original numerator.

51 - (12 x 4) = 3

Step 3 - Put Together

Keep the original denominator and use the answers from Step 1 and Step 2 to get this:

4  

   3  

   12  

Step 4 - Minimize

Minimize the fraction part from Step 3 by dividing the numerator and denominator by 3, which is the greatest common factor, to get the final answer. 51/12 as a Mixed Number is:

4  

   1  

   4  

5 0
3 years ago
The metric system is easy to use because it is based on units of ten. how many centimeters are there in 100 meters?
IceJOKER [234]
The answer is:  " 10,000 cm " .
_________________________________________________
Note:  100 cm = 1 m  (exact measurement); in which: 

                     "cm" = centimeter(s) ;
                      "m"  = meter(s) ;
_________________________________________________
  100 m = ? cm ?

100 m * (100 cm / 1 m)  =  __?__   cm  ;

The units of "m" cancel out;  and we have:

(100)* (100 cm) = 10,000 cm .
_______________________________________
5 0
3 years ago
Tina is saving to buy a notebook computer. She has two options. The first option is to put $200 away initially and save $10 ever
Mamont248 [21]

Answer: In five months,she will save the same money which is $250.

Step-by-step explanation:

Using the first statement we can generate the function y=10x + 200  and using the second statement we can also generate the function y = 30x + 100 . Now using the two equations solve for x and y to determine how many months they cost the same.

y = 10x + 200

y = 30x + 100  

Substitute the value of x in the first equation into the second equation.

30x + 100= 10x + 200   now solve for x

         -100            -100

30x = 10x + 100

-10x    -10x

20x = 100

x= 5  

This means in five months Tina will save the same amount. Now to find out how much the amount is, plot the value of x into one of the equations and solve for  y.

y = 10(5) + 200

y = 50 + 200

y = 250  

She will save $250 with either option.

7 0
3 years ago
HELP ME I DOMT UNDERSTAN
guajiro [1.7K]
The first one is -30 seconds
the second one is 20 meters
the third one is 0
3 0
3 years ago
Read 2 more answers
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