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3 years ago

What is 80 percent of 90

Mathematics

2 answers:

fredd [130]3 years ago

6 0

80 percent of 90 is 72

Karolina [17]3 years ago

3 0

80 percent of 90 is 72! :)

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A company sells t-shirts for $6 each. They also charge a one-time processing fee of $3 per order. Jamie ordered t-shirts and pai

jenyasd209 [6]

$45-$3
you would do this to take out the processing fee.
$42/ $6
this is because each shirt cost $6
the equation would be (45-3) / 6= 7]
your answer would be 7 shirts

4 0

3 years ago

75 is 128% of what number

Oksana_A [137]

$\bold \pink{let \: the \: number \: be \: x}$

$\mathsf{128\% \times x = 75}$

$\\ \\ \frac{128}{100} \times x = 75 \\ \\ x = \frac{75}{1} \times \frac{100}{128} \\ \\ x = \frac{7500}{128}$

$\boxed{x = 58.59375}$

75 is 128% of 58.59375

5 0

3 years ago

Read 2 more answers

Evaluate each series.<br> 50 points and brainless!

konstantin123 [22]

Answer:

<u>Sum of n terms of a GP:</u>

Sₙ = a₁(rⁿ - 1)/(r - 1)

a₁ = 5
r = 2
n = 9
S₉ = 5(2⁹ - 1)/(2 - 1) = 5(511) = 2555

Correct choice is C

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

a₁ = 12
r = 1/2
n = 5
S₅ = 12(1 - (1/2)⁵)/(1 - 1/2) = 12(31/32)/(1/2) = 23.25

Correct choice is A

3 0

3 years ago

(Compound Amount and Compound Interest)

Igoryamba

ok done...........................

6 0

3 years ago

Keshav and Noel started to cycle together from Nehru Park. Keshav takes a break to drink water after (k hours), where k is the f

Oduvanchick [21]

Answer:

LCM (k, n) = 10 and HCF(k, n) = 2

Step-by-step explanation:

The given parameters are;

The time after which Keshav takes a break = k hours

The value of k = The first smallest prime natural number

Therefore, by mathematical definition, k = 2

The time after which Noel takes a break = n hours

The value of n = The fifth smallest composite natural number

The first five composite numbers are given as follows;

4, 6, 8, 9, and 10

Therefore, the fifth smallest composite natural number = 10 = n

The LCM (k, n) = LCM (2, 10) = Least common multiple of 2 and 10 is given as follows;

Dividing by 2, we get;

2/2 = 1, 10/2 = 5

Dividing the result by 5, we get;

5/5 = 1

Multiplying the devisors together gives;

5 × 2 = 10

Therefore, the LCM of 2 and 10 = 10

LCM(2, 10) = LCM (k, n) = 10

The HCF(k, n) = HCF of 2 and 10 = The highest common factor that divides both 2 and 10 is given as follows;

Dividing 2 and 10 by 2 gives;

2/2 = 1 and 10/2 = 5

Therefore, HCF(k, n) = The highest common factor of 2 and 10 = HCF(2, 10) = 2

4 0

3 years ago