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2 years ago

If

Mathematics

1 answer:

lesantik [10]2 years ago

8 0

Answer:

x = (64 + 5) ÷ 3

Step-by-step explanation:

3x - 5 = 64

Add 5 to both sides: 3x = 64 + 5 = 69

Divide both sides by 3: x = 69 ÷ 3 = 23

So the answer is x = (64 + 5) ÷ 3

Note: If we didn't add the parentheses then using the order of operation x = 64 + 5 ÷ 3 would be x = 64 + $\frac{5}{3}$ = 65 $\frac{2}{3}$

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IgorC [24]

Answer:

Interest rate, R = 244%

Step-by-step explanation:

Given the following data;

Principal = $270

Simple interest = future amount - principal = 309.60 - 270 = $39.60

Time = 22/360 = 0.06 years

To find the interest rate?

Mathematically, simple interest is calculated using this formula;

$S.I = \frac {PRT}{100}$

Where;

S.I is simple interest.

P is the principal.

R is the interest rate.

T is the time.

Substituting into the equation, we have;

$39.60 = \frac {270*R*0.06}{100}$

Cross-multiplying, we have;

$39.6 * 100 = 16.2*R$

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which expression is equivalent to 100 n2 − 1? (10n)2 − (1)2 (10n2)2 − (1)2 (50n)2 − (1)2 (50n2)2 − (1)2

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Regroup:
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So the correct answer is :
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sergejj [24]

Answer:

Sandra need to score at least 56% in her fifth test so that her average is 80%.

Step-by-step explanation:

Given:

First 4 test scores = 87%, 92%, 76%,89%

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Solution:

Let the minimum score she needs to make in fifth test be 'x'.

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