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OlgaM077 [116]
3 years ago
13

PLSSSS HELP ASSAP 50 POINTS FPR FIRST PERSON TO ANSWER ​

Mathematics
1 answer:
Dafna1 [17]3 years ago
6 0

Answer:

a. 2/3 or 0.6666...

b. AB = 6cm and AD = 3cm

Step-by-step explanation:

28/42 = 2/3

14/21 = 2/3

42*1/7 = 6

21*1/7 = 3

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If + 3 = 27 − 3 = 9,ℎ = ?<br> A. 3<br> B. 9<br> C. 14<br> D. 18<br> E. 36
tekilochka [14]
D you have to substitute the h with 27

Hope this helps
7 0
3 years ago
Two different types of polishing solutions are being evaluated for possible use in a tumble-polish operation for manufacturing i
murzikaleks [220]

Answer:

p-value: 1.000

There is enough evidence at the 1% level of significance to suggest that the proportions are not equal.

Step-by-step explanation:

We will be conducting a difference of 2 proportions hypothesis test

The hypothesis for this test is:

H_0:  p1 - p2=0

H_a:  p1 - p2  ≠0

(p1 ) = 252/300 = 0.84

(p2) = 195/300 = 0.65

This is a 2 tailed test with a significance level of 1%.  So our critical values are:  z > 2.575  and z < -2.575

See the attached photo for the calculations for this test

8 0
3 years ago
1/4c= __pints please help me this is really hard
Studentka2010 [4]

Answer:

0.125.

If c is cup then 1 cup = 0.5 US Liquid pint and 1/4c should be 0.125.

Step-by-step explanation:


4 0
3 years ago
Find x (Will mark brainliest if you are right)
Marizza181 [45]

Answer:

Step-by-step explanation:

(-3x + 2)(45x + 21) + (-4x + 25) = 50

-135x^2 - 63x + 90x + 42 - 4x + 25 = 50

-135x^2 + 23x + 67 = 50

-135x^2 + 23x + 67 - 50 = 0

-135x^2 + 23x + 17 = 0

quadratic formula : x = (-b ± √b^2 - 4ac)/2a

a = -135, b = 23, c = 17

x = -23 ± √23^2 - 4(-135)(17) / (2(-135)

x = (-23 ±√9709 )/ -270

x = 23/270 ± 1 / 270√9709/270

x = 0.4501 or x = - 0.2798 <=== these answers are rounded

4 0
3 years ago
Jayla buys and sells vintage clothing. She bought two blouses for $25.00 each and later sold them for $38.00 each. She bought th
kompoz [17]
If you’re looking for profit is would be $59.00
7 0
3 years ago
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