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3 years ago

Sandy evaluated the expression below

Mathematics

2 answers:

andre [41]3 years ago

8 0

Answer:

Sandy should have evaluated (-2)³ as -8

Step-by-step explanation:

(-2)³ (6 - 3) - 5(2 + 3) = -8 · 3 - 5 · 5 = - 24 - 25 = - 49

Because:

(-2) · (-2) · (-2) = 4 · (-2) = - 8

God with you!!!

Fittoniya [83]3 years ago

6 0

Answer: a

Step-by-step explanation:

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Zinaida [17]

Answer:

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Step-by-step explanation:

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3 years ago

Solve x2 + 1/2x +1/16=4/9

kolezko [41]

Answer:

x = 0.417 or x = -0.917

Step-by-step explanation:

We are given the following expression and we are to solve it for the variable x:

$x ^2 + \frac { 1 } { 2 } x + \frac { 1 } { 1 6 } = \frac { 4 } { 9 }$

We will find the least common multiple of 2. 6 and 9:

$x^2 \times 144 +\frac{1}{2}x \times 144 +\frac{1}{16} \times 144 = \frac{4}{9} \times 144$

Simplifying it to get:

$144x^2+72x+9=64$

$144x^2+72x+9-64=0$

$144x^2+72x-55=0$

Using the quadratic formula to solve for x:

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

$x=\frac{-72 \pm\sqrt{72^2-4(144)(-55)} }{2a}$

$x=\frac{5}{12}$ or $0.417$

$x=-\frac{11}{12}$ or $-0.917$

3 0

3 years ago

How do I do multiplication?

levacccp [35]

Multiply the number in the tens place of the bottom number by the number in hundreds place of the top number. Multiply 3 times 7 to equal 21. Add the 1 you carried to equal 22. You don't need to carry the 2 in 22, as there are no more numbers to multiply on this line, so you can just write it down next to the 6.

7 0

3 years ago

Read 2 more answers

<img src="https://tex.z-dn.net/?f=%5Csf%20x-12%3D14" id="TexFormula1" title="\sf x-12=14" alt="\sf x-12=14" align="absmiddle" cl

suter [353]

Answer:

X - 12 = 14
+12. +12

X = 26

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2 years ago

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Irina18 [472]

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3 years ago