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Studentka2010 [4]
3 years ago
14

A and b pleaseeeee mathsssssss

Mathematics
1 answer:
Stella [2.4K]3 years ago
8 0
Answer for a: 90ml

explanation: cylinder B is 3 times as much of cylinder A (60/20=3)
so you multiply 30 x 3 and get 90.

hope this helps :)
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A woman works out by running and swimming. When she runs, she burns 7 calories per minute. When she swims, she
olga_2 [115]

The inequality that describes the calories burned is 7x + 9y ≥ 441

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more numbers and variables.

An independent variable is a variable that does not depends on other variable while a dependent variable is a variable that depends on other variable.

let x represent the number of minutes of running and y represent the number of minutes of swimming, hence:

7x + 9y ≥ 441

The inequality that describes the calories burned is 7x + 9y ≥ 441

Find out more on equation at: brainly.com/question/2972832

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6 0
1 year ago
A spinner has 20 total spaces that are either blue or red. The spinner is spun, and a die is rolled. If the probability of landi
juin [17]

Answer:

Step-by-step explanation:

Remark

We have to assume that the die is a cube.

We know that getting a 3, if the die is fair,  is 1 chance out of 6 = 1/6

We don't know how many blues there are on the spinner, but we do know that the number of them is over 20. So that's x/20

Now multiply the left side to get the combined probability. x/20 * 1/6. The result is 10.83/ 100

Solution

(x/20) * (1/6) = 10.83/100

x / 120 = 10.83/100                     Multiply both sides by 120

x = 10.83 * 120 / 100

x = 12.996 which is going to round to 13

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6 0
3 years ago
A right triangle, DEF, is shown below.<br><br> What is sin FDE?
RoseWind [281]

Answer:

22.6°

Step-by-step explanation:

Reference angle = <FDE

Side opposite to <FDE = 5

Hypotenuse = 13

The trigonometric ratios to apply is:

sin(\theta) = \frac{opp}{hyp}

Plug in the values

sin(\angle FDE) = \frac{5}{13}

sin(\angle FDE) = 0.3846

\angle FDE = sin^{-1}(0.3846)

\angle FDE = 22.6 (nearest tenth)

3 0
3 years ago
Can someone please help me with this because I don’t get it
yulyashka [42]

Answer:

161

Step-by-step explanation:

the sum of the two interior angles equals that exterior angle

121+40=161

8 0
3 years ago
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Walt was paying $36 a month for his cell phone service. His new cell phone service costs him $28 a month.
Aleksandr [31]
$48 because you have to find the totals for both then subtract

5 0
3 years ago
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