All categories

3 years ago

Evaluate: 2^-2 x (13x3)-5^3

Mathematics

2 answers:

Lapatulllka [165]3 years ago

6 0

2^-2 x (13x3)-5^3

1/ (2^2) * 39 - 125

1/4 *39 -125

39/4 -125

9 3/4 - 125

factor out -1

- (125-9 3/4)

borrow to subtract the fraction

- (124 4/4 - 9 3/4)

- (115 1/4)

-115 1/4

Rainbow [258]3 years ago

3 0

Answer:

-115.25

2^-2 x (13x3)-5^3

2^-2 x (39)- 5^3

2^-2 x (39)- 125

0.25 x (39) - 125

9.75 - 125

-115.25

You might be interested in

HELPPPPPPPPP i have the most trouble with math what’s the answer??

lakkis [162]

Answer:

Second Option

$\frac{5\sqrt{11} +5\sqrt{3}}{8}$

Step-by-step explanation:

To simplify the expression you must multiply the numerator and the denominator of the fraction by the conjugate of the denominator.

If you have an expression of the form

$a -b$ then its conjugate will be $a + b.$

The result of that multiplication will be

$a ^ 2 -b ^ 2$

Therefore we have the expression

$\frac{5}{\sqrt{11} -\sqrt{3}}$

By multiplying by the conjugate of the denominator we have

$\frac{5}{\sqrt{11} -\sqrt{3}}*\frac{\sqrt{11} +\sqrt{3}}{\sqrt{11} +\sqrt{3}}\\\\\\\frac{5(\sqrt{11} +\sqrt{3})}{(\sqrt{11})^2 -(\sqrt{3})^2}\\\\\\\frac{5\sqrt{11} +5\sqrt{3}}{11 -3}\\\\\\\frac{5\sqrt{11} +5\sqrt{3}}{8}$

6 0

3 years ago

PLzzz help this is due in 20mins. The standard recipe for Hershey's chocolate is 3 cups cocoa and 2 cups milk. If Hershey's deci

klio [65]

Answer: 60 cups of cocoa and 40 cups of milk I believe

Step-by-step explanation:

times 3 cups of cocoa by 20

times 2 cups of milk by 20

7 0

3 years ago

Read 2 more answers

Will give Brainliest! if right!

Sliva [168]

The answer is b i think

4 0

3 years ago

Read 2 more answers

What is the missing length?<br> 3 yd<br> 6 yd<br> area = 39 yd 2

insens350 [35]

Answer:

2 your welcome

Step-by-step explanation:

3 0

3 years ago

Can someone please help me get 2 brainliest?

Rasek [7]

Answer:

what?

Step-by-step explanation:

8 0

3 years ago