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2 years ago

(3+1)(6x9)-23 Using Pemdas explain and answer this question

Mathematics

2 answers:

BabaBlast [244]2 years ago

6 0

193 just because it is the answer use a calculator

lapo4ka [179]2 years ago

5 0

Answer:

193

Step-by-step explanation:

Parenthesis

Exponent

Multiply

Divide

Add

Subtract

3+1 can be simplified to 4

6 times 9 is 54

(4)(54)-23

216-23

193

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For every integer k from 1 to 10, inclusive the "k"th term of a certain sequence is given by (−1)(k+1)∗(12k). If T is the sum of

Katena32 [7]

Answer:

Option D. is the correct option.

Step-by-step explanation:

In this question expression that represents the kth term of a certain sequence is not written properly.

The expression is $(-1)^{k+1}(\frac{1}{2^{k}})$ .

We have to find the sum of first 10 terms of the infinite sequence represented by the expression given as $(-1)^{k+1}(\frac{1}{2^{k}})$ .

where k is from 1 to 10.

By the given expression sequence will be $\frac{1}{2},\frac{(-1)}{4},\frac{1}{8}.......$

In this sequence first term "a" = $\frac{1}{2}$

and common ratio in each successive term to the previous term is 'r' = $\frac{\frac{(-1)}{4}}{\frac{1}{2} }$

r = $-\frac{1}{2}$

Since the sequence is infinite and the formula to calculate the sum is represented by

$S=\frac{a}{1-r}$ [Here r is less than 1]

$S=\frac{\frac{1}{2} }{1+\frac{1}{2}}$

$S=\frac{\frac{1}{2}}{\frac{3}{2} }$

S = $\frac{1}{3}$

Now we are sure that the sum of infinite terms is $\frac{1}{3}$ .

Therefore, sum of 10 terms will not exceed $\frac{1}{3}$

Now sum of first two terms = $\frac{1}{2}-\frac{1}{4}=\frac{1}{4}$

Now we are sure that sum of first 10 terms lie between $\frac{1}{4}$ and $\frac{1}{3}$

Since $\frac{1}{2}>\frac{1}{3}$

Therefore, Sum of first 10 terms will lie between $\frac{1}{4}$ and $\frac{1}{2}$ .

Option D will be the answer.

3 0

3 years ago

Please help!

seropon [69]

Answer:

0.246¯¯¯¯ written as a fraction in simplest form?

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8 0

4 years ago

I’m confused on this question

Rudiy27

Answer:

Step-by-step explanation:

A triangle always has a total of 180 degrees

Since we know two we can solve for x

76+41+x=180

x=63

7 0

3 years ago

Read 2 more answers

Solve the equation using square roots. 2(x + 1)2 - 7 = 25 solution: x=

denpristay [2]

x=7

I'm sorry if I'm wrong

8 0

3 years ago

Simplify the expression (4x^3y^-5)^4

Elanso [62]

Answer:

64x^12 / y^20

Step-by-step explanation:

(4x^3y^-5)^4

Distribute the exponential value of 4 to all terms in the parentheses.

4^4 * x^(3*4) * y^(-5*4)

Multiply each exponent.

64x^12 * y^-20

Make the negative exponent positive by making it a fraction.

64x^12 / y^20

5 0

3 years ago