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3 years ago

Write 7/13 as a decimal and round to the nearest hundredth.

Mathematics

2 answers:

Alja [10]3 years ago

4 0

0.54 is the answer!!!!!!!

storchak [24]3 years ago

4 0

I'm pretty sure it 0.53 but I could me wrong

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Simplify the expression (2−3i) (5+i) by distributing. Express your answer in a+bi form, Step by Step.

Usimov [2.4K]

Answer:

13-13i

Step-by-step explanation:

2(5+i)-3i(5+i)

10+2i-15i-3i²

10-13i+3

13-13i

7 0

3 years ago

A swimming pool has to be drained for maintenance. The pool is shaped like a cylinder with a diameter of 5 m and a depth of 1.4

Korolek [52]

Answer:

8 hours

Step-by-step explanation:

basic equation

Q (flow rate) = V (volume)/ t (time)

so to find the time we just rearrange the equation and become

t = V/Q

V of cylinder

V = πr²T

and r (radius) = ½ diameter

V = 3.14 x 5² x 1.4

V = 109.9 m³

if the Q is 13 m³/hour then

t = 109.9/13 = 8.453 hours

round to nearest hour = 8 hours

6 0

3 years ago

Sum of three like fractions is 18/11. the first 2 fractions are 1/11 and 9/11. find the third fraction.

Mariulka [41]

Answer:

$\frac{8}{11}$

Step-by-step explanation:

Since the fractions are like, their denominators are 11, then

consider the values that sum to give 18 , that is

1 + 9 + ? = 18

10 + ? = 18 ( subtract 10 from both sides )

? = 8

Then the third fraction is $\frac{8}{11}$

5 0

3 years ago

If K = (AB)/(A+B) , then B =?

ziro4ka [17]

Answer:

K(A+B)/A

Step-by-step explanation:

K = (AB)/(A+B)

K(A+B)=AB

K(A+B)/A=B

6 0

3 years ago

Answer the question below

lys-0071 [83]

Answer:

A) -1

Step-by-step explanation:

$\frac{3 + 2\sqrt{5} }{2\sqrt{5}-3 } \\$

We can rewrite 2√5 - 3 as -(3 + 2√5)

Therefore,

$\frac{3+ 2\sqrt{5} }{-(3 + 2\sqrt{5} )} \\$

We can cancel out 3 + 2√5 both in the numerator and the denominator. So we get

= 1/-1

= -1

Answer : A) -1

Thank you.

6 0

3 years ago