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3 years ago

PLZ HELP ASAP NOT MULTIPLE CHOICE USE ORDER OF OPERATIONS

Mathematics

1 answer:

natka813 [3]3 years ago

8 0

Answer:

$\frac{(a + b)^{2} }{a - 2 {b}^{2} } = \frac{ {(6 + ( - 8))}^{2} }{6 - 2 {( - 8)}^{2} } = \frac{(6 - 8)^{2} }{6 - 2(64)} \\ \\ = \frac{( - 2)^{2} }{6 - 128} = \frac{4}{ - 122} = - 0.032787$

I hope I helped you^_^

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Please help me with this question

vladimir1956 [14]

9514 1404 393

Answer:

x = 7 1/3

Step-by-step explanation:

The smaller triangle is 6/9 = 2/3 the size of the larger triangle, so the left side is ...

(x -2) = (2/3)(8)

3(x -2) = 16 . . . . . multiply by 3 to clear fractions

3x -6 = 16 . . . . . . eliminate parentheses

3x = 22 . . . . . . . . add 6; next divide by 3*

x = 22/3 = 7 1/3 . . . . . feet

_____

* Note that we multiplied by 3, then divided by 3. If you're comfortable working with fractions and/or mixed numbers, these steps are unnecessary. The answer is simply x = 2 + 16/3 = 22/3.

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3 years ago

Evaluate the following

IRINA_888 [86]

(a) $[\frac{9}{2.6} - \frac{2.5^{2} }{2.5} ]^{2}$

Answer:

$[\frac{9}{2.6} - \frac{2.5^{2} }{2.5} ]^{2}$

= $[\frac{9}{2.6} - \frac{2.5*2.5 }{2.5} ]^{2}$

= $[\frac{9}{2.6} - \frac{2.5}{1} ]^{2}$

*canceling 2.5 in numerator and denominator*

$= [\frac{9-(2.5)(2.6)}{2.6} ]^2\\*Using L.C.M of 2.6 and 1 which comes out to be '2.6'= [\frac{9-(6.5)}{2.6} ]^2\\= [\frac{2.5}{2.6} ]^2\\*multiplying and dividing by '10'= [\frac{2.5*10}{2.6*10} ]^2\\= [\frac{25}{26} ]^2\\= \frac{25^2}{26^2}\\= \frac{625}{676}\\= 0.925$

Properties used:

Cancellation property of fractions

Least Common Multiplier(LCM)

The least or smallest common multiple of any two or more given natural numbers are termed as LCM. For example, LCM of 10, 15, and 20 is 60.

(b) $[[\frac{3x^{a}y^{b}} {-3x^{a} y^{b} } ]^{3} ] ^{2}$

Answer:

$[[\frac{3x^{a}y^{b}} {-3x^{a} y^{b} } ]^{3}] ^{2}\\$

*using $[x^{a}]^b = x^{ab}$ *

$= [\frac{3x^{3a}y^{3b}} {-3x^{3a} y^{3b} }] ^{2}$

*Again, using $[x^{a}]^b = x^{ab}$ *

$= \frac{3x^{2*3a}y^{2*3b}} {-3x^{2*3a} y^{2*3b} } \\= (-1)\frac{3x^{6a}y^{6b}} {3x^{6a} y^{6b} }\\[\tex]*taking -1 common, denominator and numerator are equal*[tex]= -(1)\frac{1}{1}\\= -1$

Property used: 'Power of a power'

We can raise a power to a power

(x^2)4=(x⋅x)⋅(x⋅x)⋅(x⋅x)⋅(x⋅x)=x^8

This is called the power of a power property and says that to find a power of a power you just have to multiply the exponents.

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3 years ago

at a local preschool there is a ratio of 4 of 3 boys to every 4 girls if there are 245 total preschoolers enrolled how many are

TiliK225 [7]

There are 105 boys. and 140 girls

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3 years ago

Which expression shows the result of applying the distributive property to 3(1/5 x - 1/7)

steposvetlana [31]

Answer:

o.6x- 0.42857142857

Step-by-step explanation:

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3 years ago

write an expression for the calculation the difference of 35 and 7 divided by the difference of 9 and 2

Rudik [331]

Answer:

35-7/ 9-2

28/7

Step-by-step explanation:

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3 years ago