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3 years ago

.

Mathematics

2 answers:

4vir4ik [10]3 years ago

8 0

Answer:

37.5%

Step-by-step explanation:

You need to convert this fraction into a decimal to start. After you do this you need to turn the decimal into its percentage form. Soo 0.375 = 3/8 = 37.5%

Burka [1]3 years ago

4 0

Answer:

shaded area = 3/8 of whole shape = 3/8 * 100 =37.5% to do this without a calculator = To convert 3/8 so you can write it as a decimal, simply divide the numerator by the denominator, like this:

= 3/8

= 3 ÷ 8

= 0.375 or show long division 3/2 / 2 (/2 /2 ) = 1.5 / 2 (/ 2) = 0.75 /2 = 0.375

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The ratio of a to b is 3 to 1, and the ratio of b to c is 1 to 5. What is the value of 2a+3b/ 4b+3c?

Nostrana [21]

Answer:

Step-by-step explanation:

Expressing the ratios as fractions, that is

$\frac{a}{b}$ = $\frac{3}{1}$ ( cross- multiply )

a = 3b

$\frac{b}{c}$ = $\frac{1}{5}$ ( cross- multiply )

c = 5b

------------------------------------------

Given

$\frac{2a+3b}{4b+3c}$ , substitute values from above for a and c

= $\frac{2(3b)+3b}{4b+3(5b)}$

= $\frac{6b+3b}{4b+15b}$

= $\frac{9b}{19b}$ ← cancel b on numerator/ denominator

= $\frac{9}{19}$ → B

6 0

4 years ago

The price of a watch was increased by 20% to £144. What was the price before the increase?

hammer [34]

Answer:

120 pounds

Step-by-step explanation:

Since the new cost is 144 pounds and this is 20% more, this is 120% of the original price. Remember 100+20 = 120. To find the original price set up a proportion with these values:

$\frac{144}{x}=\frac{120}{100}$

Solve for the original price by cross multiplying numerator with denominator.

x(120) = 144(100)

120x = 14400

x= 120 pounds

6 0

4 years ago

Write the domain of begin function . . . f of x equals, the square root of the quantity . . . 2 times x plus 1 . . . end functio

Anni [7]

Domain of $f(x)=\sqrt{2x+1}$ are the values of x for which 2x + 1 < 0
2x < -1
x < -1/2

Therefore, domain is all real numbers less than -1/2

4 0

3 years ago

Ivan sold 31 boxes of oranges on Friday and 29 boxes on Saturday during a citrus sale. There were 10 oranges in each box. How ma

ycow [4]

Answer:

600

Step-by-step explanation:

31 plus 29 is 60

60 x 10 = 600

7 0

3 years ago

Factorise x(6x - 5y) - 4(6x - 5y)^2

Fed [463]

Answer:

(6x-5y)(20y-23x)

Step-by-step explanation:

x(6x - 5y) - 4(6x - 5y)^2

= (6x-5y)(x-4(6x-5y))

= (6x-5y)(x-24x+20y)

= (6x-5y)(20y-23x)

5 0

3 years ago