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Virty [35]
3 years ago
15

Solve the equation for x: x^2-ax-bx+ab=0

Mathematics
2 answers:
____ [38]3 years ago
5 0

Answer:

x = a

x = b

Step-by-step explanation:

solve the equation for x by finding a, b and c of the quadratic then applying the quadratic formula

Anarel [89]3 years ago
5 0
X= (ab + b^2 / a+b) is the solution of the equation for x
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Sophia uses 18 beads to make a necklace. Three sixths of the beads are purple. How many beads are purple?
joja [24]

Answer:

9 beads are purple

Step-by-step explanation:

we know that

To find out how many  beads are purple, multiply the total beads by the fraction of the beads that are purple

so

18(\frac{3}{6})=9\ beads

therefore

9 beads are purple

Another way to solve the problem is convert the fraction in percentage

we have

\frac{3}{6}=\frac{1}{2}=0.50*100=50\%

so

If the total are 18 beads

50% is 9 beads

therefore

9 beads are purple

8 0
3 years ago
What integers are plotted on the number line below?
qaws [65]

Answer:

The answer is c. hope this helps

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
Which figures are polygons?
castortr0y [4]
Your answer would be A, B, and C.
8 0
3 years ago
Read 2 more answers
The class average on a math test was an 82 with a standard deviation of 5. If the 
Alex787 [66]

Answer:

Option 3 and 4.

Step-by-step explanation:

The z score shows by how many standard deviations the raw score is above or below the mean. The z score is given by:

z=\frac{x-\mu}{\sigma} \\\\where\ x=raw\ score,\mu=mean, \ \sigma=standard\ deviation

Given that mean (μ) = 82, standard deviation (σ) = 5

1) For x = 74:

z=\frac{x-\mu}{\sigma} \\\\z=\frac{74-82}{5} =-1.6

Option 1 is incorrect

2) For x < 87

z=\frac{x-\mu}{\sigma} \\\\z=\frac{87-82}{5} =1

From the normal distribution table, P(x < 87) = P(z < 1) = 0.8413 = 84.13%

Option 2 is incorrect

3) For x = 95:

z=\frac{x-\mu}{\sigma} \\\\z=\frac{95-82}{5} =2.6

Option 3 is correct

4) For x < 77

z=\frac{x-\mu}{\sigma} \\\\z=\frac{77-82}{5} =-1

From the normal distribution table, P(x < 77) = P(z < -1) = 0.16 = 16%

Option 4 is correct

5) For x > 92

z=\frac{x-\mu}{\sigma} \\\\z=\frac{92-82}{5} =2

From the normal distribution table, P(x > 92) = P(z > 2) = 1 - P(z < -2) = 1 - 0.9772 = 0.0228 = 2.28%

Option 5 is incorrect

8 0
2 years ago
(a)Tom bought 12 pounds of sugar for $6 . How many dollars did he pay per pound of sugar? (b)It takes 55 pounds of seed to compl
Gala2k [10]
(a) 0.50 per pound, you do 6 divided by 12 
(b) 9.17 pounds per field, you do 55 divided by 6
3 0
3 years ago
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