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larisa [96]
3 years ago
11

PLEASE HELP i have less than 20 mins left

Mathematics
1 answer:
gulaghasi [49]3 years ago
3 0

3a) Answer: 84 degrees

Step-by-step explanation:

3x + 2(x+20)= 180 (total sum of angles in a triangle is 180 degrees)

5x+40 = 180

5x = 140

x= 28

3x= 28 x 3

   = 84

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A pancake recipe calls for 1/3 cup of mix for 4 pancakes. If Beth needs to make 60 pancakes how many cups of pancake mix will sh
liq [111]
The recipe is for 4 pancakes.
She needs to make 60 pancakes.
60/4 = 15
She needs to make 15 times the recipe.
The recipe calls for 1/3 cup of mix, so she needs 15 times that amount.

15 * 1/3 = 15/1 * 1/3 = 15/3 = 5

Answer: She needs 5 cups of mix.
5 0
3 years ago
Read 2 more answers
How to solve equation an equation without y using elimination method
Sedbober [7]

Work only with the second equation at the beginning. Solve for x for it.

7x - 2x = 3                Combine the left hand side.

5x = 3                       Divide by 5

5x/5 = 3/5                Do the division

x = 3/5 = 0.6    

==============

Now work with the top equation.

3(0.6) + 5y = 13              Multiply on the left.

1.8 + 5y = 13                   Subtract 1.8 from both sides.

1.8 - 1.8 + 5y = 13 - 1.8    Do the subtraction

5y = 11.2                          Divide by 5

5y/5 = 11.2/5

y = 2.24                           Answer

3 0
4 years ago
1) 2/9 + 5/9 =
s344n2d4d5 [400]

Answer:

1. 7/9

2. 7/16

3. 3/7

4. 123/125

Step-by-step explanation:

1. Simplify the following:

2/9 + 5/9

2/9 + 5/9 = (2 + 5)/9:

(2 + 5)/9

2 + 5 = 7:

Answer: 7/9

_________________________

2. Simplify the following:

3/4 - 5/16

Put 3/4 - 5/16 over the common denominator 16. 3/4 - 5/16 = (4×3)/16 - 5/16:

(4×3)/16 - 5/16

4×3 = 12:

12/16 - 5/16

12/16 - 5/16 = (12 - 5)/16:

(12 - 5)/16

12 - 5 = 7:

Answer: 7/16

_____________________________________________

3. Simplify the following:

6/7×1/2

6/7×1/2 = 6/(7×2):

6/(7×2)

6/2 = (2×3)/2 = 3:

Answer: 3/7

__________________________________________________

4. Rewrite the decimal number as a fraction with 1 in the denominator

0.984=0.984/1

Multiply to remove 3 decimal places. Here, you multiply top and bottom by 10^3 = 1000

(0.984/1)×(1000/1000)= 984/1000

Find the Greatest Common Factor (GCF) of 984 and 1000, if it exists, and reduce the fraction by dividing both numerator and denominator by GCF = 8,

(984/8) = 123

(1000/8) = 125

Therefore

X=123/125

In conclusion,

Answer: 0.984=123/125

4 0
3 years ago
Which of the following represents a relation that is NOT a function? A. X 7 -5 10 -7 Y 34 32 40 34 B. X -7 -5 -7 2 Y 34 32 40 34
Nostrana [21]
The x-value of -7 shows up more than once in relation ...
  B. X -7 -5 -7 2 Y 34 32 40 34

_____
When there is more than one y-value for an x-value, the relation is NOT a function.
8 0
4 years ago
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mash [69]

Answer:

Choir kids are selling tickets to their show. There needs to be 400 tickets sold ,and there are 100 kids to sell them. How many tickets does each kid need to sell?

Step-by-step explanation:

####HHGUGnu

4 0
3 years ago
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