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Vera_Pavlovna [14]
3 years ago
9

PLEASE HELP!!! I WILL MARK BRAINLEST!!!

Mathematics
1 answer:
storchak [24]3 years ago
6 0

Answer:

Each hat is $5

Each mask is $3

Step-by-step explanation:

Hat= x dollars

Mask= y dollars

Now,

3 hats and 4 mask sold = $27

We can write

3x + 4y = 27

Adding the second equation (-1 times 1st equation) gives us;

3x + 6y = 33

-1* (3x + 4y = 27)

3x + 6y = 33

-3x -4y = 27

2y = 6

y = 6/2

***y = 3***

Now we replace y= 3 into 1st equation and solve for x:

3x + 4y = 27

3x + 4(3) = 27

3x + 12 = 27

3x + 15

x = 15/3

***x= 5***

Each hat costs $5

Each mask costs $3

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A triangle contains angles mesuring 28 degrees and 37 degrees. How many degrees is the third angle?​
Orlov [11]

Answer:

  • 115°

Step-by-step explanation:

<u>We know that:</u>

  • Angles ∠A and ∠B are 28° and 37°.

<u>We don't know:</u>

  • Angle ∠C's angle

<u>So, we do this:</u>

  • Add the 180°
  • Solve the equation 180 - 28 - 37

<u>Solve:</u>

  • 180 - 28
  • = 152 - 37
  • = 115.

Angle ∠C is 115°.

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2 years ago
GIVING OUT BRAINLIEST TO FIRST ✅CORRECT✅ ANSWER
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Answer:

1,-5 and -1,-3

Step-by-step explanation:

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2 years ago
What is 7035 divided by 38??
alexdok [17]
The answer is 185 ....................
8 0
3 years ago
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Flying to Kimpala with a tail wind a plane averaged 158km/hr. On the return trip the plane only average 112km/hr. While flying b
lora16 [44]

The speed of wind and speed of plane in still air  are  23  and  135 km/h respectively.

<u>Step-by-step explanation:</u>

Let the speed of wind and speed of plane in still air  are  w  and  p km/h respectively.  

The effective speed on onward journey was  

p+w=158  ................(1)

The effective speed on return journey was  

p-w=112 ..............(2)

Adding equation (1) and equation (2) we get,  

⇒ (p+w)+(p-w) = 158+112

⇒ 2p = 270

⇒ p = 135

Putting value of p = 135 in p+w=158 we get:

⇒ p+w=158

⇒ 135+w=158

⇒ w=23

Therefore ,The speed of wind and speed of plane in still air  are  23  and  135 km/h respectively.

3 0
2 years ago
Which binomial is a factor of the quadratic trinomial x2 − 7x + 12? A. (x − 6) B. (x + 2) C. (x − 4) D. (x + 3)
svet-max [94.6K]

Step-by-step explanation:

x2 - 7x + 12

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Option C is the correct answer

3 0
3 years ago
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