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3 years ago

What is x? 6x-8=8x-6

Mathematics

2 answers:

densk [106]3 years ago

8 0

Answer:

x = - 1

Step-by-step explanation:

6x - 8 = 8x - 6

6 - 8 = 8x - 6x

2x = - 2

x = - 1

aliina [53]3 years ago

4 0

Answer:

$6x - 8 = 8x - 6 \\ - 8 + 6 = 8x - 6x \\ - 2 = 2x \\ \frac{2x}{2} = \frac{ - 2}{2} \\ x = - 1$

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last year 1/5 of the students in your class played a sport this year 10 students join the class five of the new students play a

tino4ka555 [31]

Answer:

Step-by-step explanation:

last year 1/5 of the class played sports, so s = (1/5) c

the next year, s increased by 5, c increased by 10 and the fraction changed to 1/4, so for the next year (s+5) = (1/4)(c+10)

To solve this we can substitute s = (1/5)c from the first equation into the second, so

((1/5)c + 5)=(1/4)(c+10), simplify both sides

(1/5)c + 5 = (1/4)c + 10/4, simplify 10/4 to 5/2

(1/5)c + 5 = (1/4)c + 5/2, multiply both sides by 20 to eliminate fractions (least common multiple of 2, 4 and 5)

4c + 100 = 5c + 50, subtract 4c, subtract 50 from both sides

50 = c, number of students in class last year was 50, this year is 10 more, so this year is 60

5 0

2 years ago

Find the least common denominator of the two fractions 3/4 over 1/6?

leva [86]

Answer:

(2/12 & 9/12)

Step-by-step explanation:

12 is the least common denominator for the fractions, so they must be rewritten to have the same denominator, but hold the same value.

( not written by me )

8 0

3 years ago

Read 2 more answers

Okay here's the first few questions

Marina86 [1]

Answer:

1,yes

2,no

3,x=√117

4,x=12 y=6

5,x=12, y=15.75

6 0

2 years ago

B) John returns from holiday with these notes.

ivolga24 [154]

Answer:

£290.70

Step-by-step explanation:

Number of notes of $50 = 5

Total value = 50 × 5 = $250

Number of notes of $20 = 2

Total value = 20 × 2 = $40

Number of notes of $10 = 7

Total value = 10 × 7 = $70

Number of notes of $5 = 3

Total value = 5 × 3 = $15

Total value of all notes with John = 250 + 40 + 70 + 15

= $375

Since, $1.29 = £1

Therefore, $1 = £ $\frac{1}{1.29}$

Therefore, $375 = £ $\frac{375}{1.29}$

= £290.70

4 0

3 years ago

ASAP!!! PLEASE help me solve this question!!!! I really need help...

GenaCL600 [577]

Answer:

304(pi) g

Step-by-step explanation:

First we find the volume of the hollow ball. Then we find the mass using the volume and density.

Let R = exterior radius = 3 cm

Let r = interior radius = 2 cm

volume = exterior volume - interior volume

volume = (4/3)(pi)R^3 - (4/3)(pi)r^3

volume = (4/3)(pi)(R^3 - r^3)

volume = (4/3)(pi)(3^3 - 2^3) cm^3

volume = (4/3)(pi)(27 - 8) cm^3

volume = (76/3)pi cm^3

Now we use the density and the volume to find the mass.

density = mass/volume

mass = density * volume

mass = 12 g/cm^3 * (76/3)pi cm^3

mass = 304(pi) g

Answer: 304(pi) g

6 0

3 years ago

Read 2 more answers