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4 years ago

Solve: 10(1 – 2y) = –5(2y – 1)

Mathematics

1 answer:

FinnZ [79.3K]4 years ago

3 0

Answer:

Y= 1/-2

Step-by-step explanation:

10(1-2y)=5(2y-1)

10-20y= -10y+5

10+5= -20y-10y

15= -30y

y= 15/-30 or 1/-2

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Calculate the circumference of the following circles. Give your answers to 1 decimal place.

prisoha [69]

Answer:

a) 31.4 cm b) 22.0 cm c) 9.4 mm d) 18.8 m e) 1.6 m f) 28.3 cm g) 78.5 cm h) 9.7 m

Step-by-step explanation:

All it really is multiply the diameter which is the straight line through the center of the circle

C = d × \pi

8 0

3 years ago

Read 2 more answers

Jeanette obtained 32% for her statistics test, which was out of a total of 300 marks. How much should she score in the computer

Andre45 [30]

Using weighted average, it is found that she should score 67% on the computer science test.

The weighted average is given by each proportion multiplied by it's score.

In this problem, the proportions and scores are given by:

Proportion of 32% = 0.32 for a score of 300.
Proportion of x for a score of 200.
Proportion of 46% = 0.46 for a score of 300 + 200 = 500.

Then

$0.32(300) + 200x = 0.46(500)$

$200x = 0.46(500) - 0.32(300)$

$200x = 134$

$x = \frac{134}{200}$

$x = 0.67$

She should score 67% on the computer science test.

A similar problem is given at brainly.com/question/24855677

7 0

3 years ago

A probability experiment is conducted in which the sample space of the experiment is S 1,2,3,4, 5,6,7,8, 9, 10, 11, 12]. Let eve

Alenkinab [10]

Answer:

$E\ n\ F = \{1, 5, 6,7\}$

$F\ n\ G =\{9\}$

$F\ U\ G =\{1,5,6, 7, 8,9,10, 11, 12\}$

$P(F\ U\ G) = \frac{3}{4}$

Step-by-step explanation:

Given

$S = \{1,2,3,4, 5,6,7,8, 9, 10, 11, 12\}$

$E = \{1,2, 3, 4, 5, 6,7\}$

$F =\{1,5,6, 7, 8,9\}$

$G = \{9,10, 11, 12\}$

$H = \{2, 3, 4\}$

Solving (5): E and F

Sets of E and F = E n F

$E\ n\ F = \{1,2, 3, 4, 5, 6,7\}\ n\ \{1,5,6, 7, 8,9\}$

List out common elements

$E\ n\ F = \{1, 5, 6,7\}$

They are not mutually exclusive because $n(E\ n\ F) \neq 0$

Solving (6): F and G

Sets of F and G = F n G

$F\ n\ G =\{1,5,6, 7, 8,9\}\ n\ \{9,10, 11, 12\}$

List out common elements

$F\ n\ G =\{9\}$

They are not mutually exclusive because $n(F\ n\ G) \neq 0$

Solving (7): F or G and P(F or G)

Sets of F or G = F U G

$F\ U\ G =\{1,5,6, 7, 8,9\}\ U\ \{9,10, 11, 12\}$

List all elements without repetition

$F\ U\ G =\{1,5,6, 7, 8,9,10, 11, 12\}$

Solving P(F U G)

$P(F\ U\ G) = \frac{n(F\ U\ G)}{n(S)}$

$n(F\ U\ G) = 9$

$n(S) = 12$

Hence;

$P(F\ U\ G) = \frac{9}{12}$

Divide by 3

$P(F\ U\ G) = \frac{3}{4}$

6 0

3 years ago

Jerry deposited 20,000 on an investment that will give 1,750 for every year that his money stays in the account. How much money

lesya692 [45]

Answer:

$34,000

Step-by-step explanation:

Jerry will get $1,750 for every year that his money stays in the account thus for 8 years he will get:

8*1,750 = $14,000

Together with the deposited money:

$20,000 + $14,000 = $34,000

By the end of year 8 there will be $34,000 of Jerry's account.

3 0

2 years ago

Just 7 and 8 please!!

77julia77 [94]

Just multiply it so multiply 59.89 x 4 and then for number 8 multiply 88.70 x 4

4 0

4 years ago