-28.56 + 7.6x = -7.8(X + 0.7) Solve for x

Mathematics

1 answer:

Lunna [17]2 years ago

7 0

Answer: X=1.5

Step-by-step explanation:

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What is 2/3, 7/6, 3 1/9, and 5 5/18 written as a decimal?

Paul [167]

Step-by-step explanation:

$\frac{2}{3} = 2 \times \frac{1}{3} = 2 \times 0.333 = 0.666 \\ \\ \frac{7}{6} = 7 \times \frac{1}{6} = 7 \times \frac{1}{2} \times \frac{1}{3} = 7 \times 0.5 \times 0.333 = 1.1655 \\ \\ 3 \frac{1}{9} = 3 + \frac{1}{9} = 3 + ( \frac{1}{3} \times \frac{1}{ 3} ) = 3 + (0.333 \times 0.333) = 3 \times 0.11088 = 3.11088 \\ \\ 5 \frac{5}{18} = 5 + (5 \times \frac{1}{18} ) = 5 + (5 \times \frac{1}{3} \times \frac{1}{3} \times \frac{1}{2} ) = 5 +(5 \times 0.333 \times 0.333 \times 0.5) = 5 + 0.27722 = 5.27722$

4 0

2 years ago

Read 2 more answers

What is 481,026.03 in expanded form using powers of ten.

Ivan

When putting 481,026.03 into expanded form, the answer is 4.8102603 × 10^5, or using a calculator, 4.8102603e5.

Hope this helped!

Nate

8 0

2 years ago

Pleaseeee help w these math questions! please show work!!!<br><br> 50 points

Schach [20]

9. You need an exact answer. So I will give you it but I'll also give you an approximation because it might help you understand it more.

Because we know the cosine fo theta, we can evaluate the inverse cosine of -2/3 first to find theta.

$sin^{-1}(-2/3)$ = 131.81° approx.

Because 131.81° is in the second quadrant its third quadrant partner is 228.19°. Which would make the sine 0.75 approximately.

But we need an exact answer I suppose so which is this disgusting mess... $sin(2\pi -cos^{-1}(\frac{-2}{3}))$ . I know it looks scary but it is basically all the steps we just did but without evaluating anything.