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3 years ago

Find the missing value 7/8 = x/28.8 WITH WORK

Mathematics

1 answer:

Juliette [100K]3 years ago

5 0

Answer:

$\displaystyle x = 25.2$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Step-by-step explanation:

Step 1: Define

$\displaystyle \frac{7}{8} = \frac{x}{28.8}$

Step 2: Solve for x

Cross-multiply: $\displaystyle 201.6 = 8x$
Isolate x term: $\displaystyle 25.2 = x$
Rewrite: $\displaystyle x = 25.2$

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3 years ago

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Step-by-step explanation:

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3 years ago

Evaluate f(x) = x2 + 1 for f(10).

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4 years ago

Need help will give you a good rating us

vovikov84 [41]

Answer:

$\boxed{2\pm \frac{\sqrt{2}}{2}}$

Step-by-step explanation:

$2x^2-8x=-7$

$\sf Add \ 7 \ on \ both \ sides}.$

$2x^2-8x+7=-7+7$

$2x^2-8x+7=0$

$ax^2 +bx+c=0$

$\sf Apply \ quadratic \ formula.$

$a=2 \ \ \ b=-8 \ \ \ c = 7$

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

$x=\frac{-(-8)\pm\sqrt{(-8)^2-4(2)(7)}}{2(2)}$

$x=\frac{8\pm\sqrt{64-56}}{4}$

$x=\frac{8\pm\sqrt{8}}{4}$

$x=\frac{8\pm2\sqrt{2}}{4}$

$x=2\pm \frac{\sqrt{2}}{2}$

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3 years ago