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Jlenok [28]
2 years ago
8

I need help please really fast

Mathematics
1 answer:
Elina [12.6K]2 years ago
3 0

Answer:

x =  \boxed{2}\:  and\: x =  \boxed{ \frac{5}{2} }

Step-by-step explanation:

2 {x}^{2}  - 9x + 10 = 0 \\  \\ 2 {x}^{2}  - 4x - 5x + 10 = 0 \\  \\ 2x(x - 2) - 5(x - 2) = 0 \\  \\ (x - 2)(2x - 5) = 0 \\  \\ x - 2 = 0 \:  \: 2x - 5 = 0 \\  \\ x =  \boxed{2} \: and \: x =  \boxed{ \frac{5}{2} } \\  \\

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PLEASE HELP ME!!!!
antiseptic1488 [7]

Answer:

OBC= 15

OCR =30

In OBQ

OBQ + QOB + OQB = 180

OBQ= OBC=15

OQB= 90

SO, QOB = 180- OBQ- OQB

= 180-15 -90

= 75

c) is correct

5 0
3 years ago
Read 2 more answers
A politician claims that a proposal for a new traffic law is broadly supported by both political parties and that a person from
Mashutka [201]

Answer:

Based on the 95% confidence interval for the difference in population proportion, there is convincing statistical evidence that he is correct

Step-by-step explanation:

The proportion from the sample of people from his party that support the law = 70%

The number the members of the politicians political party that support the law = 550 people

The proportion from the sample of people from the other party that support the law = 65%

The number the members of the politicians political party that support the law = 420 people

The confidence level of the test = 95%

The given confidence interval for the difference in proportion, C.I. = (-0.010, 0.110)

Given that the 95% confidence interval for the difference in population proportion ranges from -0.010, to 0.110, it is 95% certain that 0 is among the likely difference in proportion between the two populations and therefore, there is sufficient statistical evidence to suggest that there is no difference in the proportion of the members of either political that support the proposed new traffic law.

4 0
2 years ago
Write 7^3 × √ 7 as a single power of 7​
olga_2 [115]

Step-by-step explanation:

7^3 × 7^(1÷2)

= 7^(3+ 0.5)

=7^3.5 ans

8 0
3 years ago
Please help don't guess
12345 [234]

So, just divide:

52.50 / 6 = 8.75

This means that she earns $8.75 an hour.

If this is her hourly salary, then multiply 8.75 x 11

8.75 x 11 = 96.25

So, if Paula works for 11 hours,  she will earn $96.25!


3 0
3 years ago
Read 2 more answers
Resuelve la siguiente ecuación: 15x = 27 + 6x (escribe el valor de x nada mas) ayudaaaaaaaaa porfavor se los pidooooo!!
kondor19780726 [428]

Answer:

x=3

Step-by-step explanation:

15x=27+6x

subtract 6x

9x=27

divide 9

x=3

8 0
3 years ago
Read 2 more answers
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