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Fed [463]
3 years ago
5

In a class of 32 students the mean height of the boys is 1.56 metres

Mathematics
1 answer:
mart [117]3 years ago
5 0

Answer: JW.org is where you can find your answers.

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Can someone please help me​
Maksim231197 [3]

Answer:

a = 84°

Step-by-step explanation:

∠ QPR and ∠ TPR are adjacent and supplementary, thus

∠TPR = 180° - 123° = 57°

Given there are parallel lines , then

∠ PTR = 27° ( alternate angle )

The external angle of a triangle is equal to the sum of the 2 opposite interior angles.

∠ TRS is an external angle , thus

∠ TRS = a = 57° + 27° = 84°

7 0
3 years ago
Read 2 more answers
Beyonce is solving a system of equations:
aivan3 [116]

Answer:

x=5, y=4. (5, 4).

Step-by-step explanation:

2x-3y=-2

4x+y=24

------------------

-2(2x-3y)=-2(-2)

4x+y=24

----------------------

-4x+6y=4

4x+y=24

--------------

7y=28

y=28/7

y=4

4x+4=24

4x=24-4

4x=20

x=20/4

x=5

8 0
3 years ago
I need help with percentages
satela [25.4K]

Answer:

3a. 7.2

3b. 0.9

4a. 7.2

4b. 2.4

5a. 104

5b. 260

hope this helps, everything in bold is the correct answer,

have an awesome day, -TJ

6 0
2 years ago
Read 2 more answers
Hilda draws a card from a deck of cards and it is a seven. The probability that it is the 7 of spades is Select one: O a. 1/3 O
Schach [20]

Answer:b

Step-by-step explanation:

Given

Hilda draws a card from a deck of cards and it is seven.

It is certain that card is 7 so there a 4 cards which can be 7

i.e. 7 of hearts,7 of spades,7 of club,7 of diamond

So probability that it is the 7 of spades is

\frac{1}{4}=0.25

8 0
3 years ago
Help with this!!plz. Asap
gizmo_the_mogwai [7]
Hey there! :D

So, we know that there are 3 z's and 3 6's. 

3*z= 3z

6*3= 18 

3(z+6) <== equivalent expression 

3z+18 <== equivalent expression

z is by itself. It shouldn't combine. It should stay the same. 6 as a unit is separate from z. 

Choices "B" and "E" are correct.

I hope this helps!
~kaikers
5 0
3 years ago
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