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Slav-nsk [51]
3 years ago
10

Solve for X. HELP PLEASE!!! ASAP

Mathematics
2 answers:
HACTEHA [7]3 years ago
5 0

Answer:

5, 6, 9

Step-by-step explanation:

1. x= -5

2.x= 6

3. x=9

gizmo_the_mogwai [7]3 years ago
3 0
1. C) -5
2. D) 6
thats what i know
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adelina 88 [10]

312 mg is not greater than 312 dg

5 0
3 years ago
What percent of $90 = $45
Lynna [10]
45 is exactly half of 90
that means 45 is 50% of 90.
8 0
3 years ago
Find the magnitude of the vector 3i +4j​
Nadusha1986 [10]

Answer:

5

Step-by-step explanation:

magnitude of the vector

=√(3²+4²)

=√25

=5

3 0
3 years ago
A certain number of sixes and nines is added to give a sum of 126; if the number of sixes and nines is interchanged, the new sum
galina1969 [7]

Answer:

Original number of sixes = 6

Original number of nines = 10

Step-by-step explanation:

We are told in the question that:

A certain number of sixes and nines is added to give a sum of 126

Let us represent originally

the number of sixes = a

the number of nines = b

Hence:

6 × a + 9 × b = 126

6a + 9b = 126.....Equation 1

If the number of sixes and nines is interchanged, the new sum is 114.

For this second part, because it is interchanged,

Let us represent

the number of sixes = b

the number of nines = a

6 × b + 9 × a = 114

6b + 9a = 114.......Equation 2

9a + 6b = 114 .......Equation 2

6a + 9b = 126.....Equation 1

9a + 6b = 114 .......Equation 2

We solve using Elimination method

Multiply Equation 1 by the coefficient of a in Equation 2

Multiply Equation 2 by the coefficient of a in Equation 1

6a + 9b = 126.....Equation 1 × 9

9a + 6b = 114 .......Equation 2 × 6

54a + 81b = 1134 ........ Equation 3

54a + 36b = 684.........Equation 4

Subtract Equation 4 from Equation 3

= 45b = 450

divide both sides by b

45b/45 = 450/45

b = 10

Therefore, since the original the number of nines = b,

Original number of nines = 10

Also, to find the original number of sixes = a

We substitute 10 for b in Equation 1

6a + 9b = 126.....Equation 1

6a + 9 × 10 = 126

6a + 90 = 126

6a = 126 - 90

6a = 36

a = 36/6

a = 6

Therefore, the original number of sixes is 6

7 0
3 years ago
Pls simplify this for me ​
strojnjashka [21]

Answer:

I think the answer is c but I didn’t simplify bc I don’t know what you mean

Step-by-step explanation:

4 0
3 years ago
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