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dezoksy [38]
3 years ago
9

Find the value of a and b a^2 + b^2 = 400

Mathematics
2 answers:
Oliga [24]3 years ago
7 0

Answer:

Step-by-step explanation:

a^2+b^2=400

a^2=400-b^2

a=sqrt(400-b^2) & -sqrt(400-b^2)

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

b^2=400-a^2

b=sqrt(400-a^2) & -sqrt(400-a^2)

ololo11 [35]3 years ago
3 0

Answer:

20

Step-by-step explanation:

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Please show you work Thankyou :)
Ilia_Sergeevich [38]

Answer:

B

Step-by-step explanation:

Firstly the unfilled circle means that it is not equal to

If you read the scale the unfilled circle is at -1 and the arrow is pointing left.

This means that x is smaller than -1 or -1 is greater than x read in the form x<-1

The filled circle means x can be equal to, in this case, 4. The arrow is pointing right so x is greater or equal to 4

x≥4

Therefore the answer is b

Hope this helps

8 0
3 years ago
The diagram represents the factorization of x2 – 9x + 18. It is partially completed.
blagie [28]

Answer:

-3x and -6x

Step-by-step explanation:

Take a look at the missing spaces. Multiply -6 with x which equals -6x

Multiply -3 with x which equals -3x

Therefore, the answer is B, -3x and -6x

3 0
3 years ago
Three fair dice are rolled, one red, one green and one blue. What is the probability that the upturned faces of the three dice a
r-ruslan [8.4K]

Answer:   \dfrac{5}{9}

Step-by-step explanation:

When we throw a die , Total outcomes =6

When we throw 3 dice , Total outcomes = 6 x 6 x 6 = 216 [by fundamental counting principle]

Given : Three fair dice are rolled, one red, one green and one blue.

Favorable outcomes : When the upturned faces of the three dice are all of different numbers i.e. no repetition of numbers allowed

By Permutations , the number of favorable outcomes = ^6P_3=\dfrac{6!}{(6-3)!}=\dfrac{6!}{3!}=6\times5\times4=120

The probability that the upturned faces of the three dice are all of different numbers = \dfrac{\text{Favorable outcomes}}{\text{Total outcomes}}

=\dfrac{120}{216}=\dfrac{5}{9}

The probability that the upturned faces of the three dice are all of different numbers  is \dfrac{5}{9} .

7 0
3 years ago
1. Given that ADEF<br> AABC, determine the length of side DF.<br> A<br> 15
marta [7]

Answer:

DEF/3 = BAC

AC(7) x 3 = 21

4 0
2 years ago
Ms. Forte’s class is studying plants. 3 students want to share a packet of 14 seeds equally. What is each child’s share?
vekshin1

you have 78 as ur answerrr

3 0
3 years ago
Read 2 more answers
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