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BaLLatris [955]
3 years ago
15

Find the value of the variable using these steps.

Mathematics
2 answers:
Aleks [24]3 years ago
4 0
0.4x+3.9=5.78 ⇒ subtracting 3.9 form both sides

0.4x+3.9-3.9=5.78-3.9

0.4x=1.88 ⇒ Divide both sides by 0.4

\frac{0.4x}{0.4}= \frac{1.88}{0.4}

x=4.7
Zanzabum3 years ago
4 0

He is correct just took the test 4.7!!!!!!!!!!!

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I need help please............
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Which set of values could be the side lengths of a 30-60-90 triangle?
jeyben [28]
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tan B = b/a
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Making your answer B
3 0
3 years ago
Read 2 more answers
Mary invests £12000 in a savings account. The account pays 1. 5% compound interest per year. Work out the value of her investmen
mestny [16]

Answer:

The value of Mary's investment after two years = £12362.7

Step-by-step explanation:P = Principal / initial amountR = rate of interest per cent per yearT = number of yearsA = final amount at the end of T yearsThen:A = P*(1 + R/100)^2In our example:P = £12000R = 1.5 per cent per yearT = 2 yearsThus:A = 12000*(1 + 1.5/100)^2   = 12000*(1 + 0.015)^2   = 12000*(1.015)^2    = 12000*(1.030225)    = 12362.7Value of investment after two years = £12362.7

4 0
2 years ago
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