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3 years ago

What is the answer to this?

Mathematics

1 answer:

Bumek [7]3 years ago

7 0

Answer:

9.5

Step-by-step explanation:

Substitute a = 5 and b = 1 into the expression

$\frac{3(5)^2+1}{9(1)^3-1}$

= $\frac{3(25)+1}{9(1)-1}$

= $\frac{75+1}{9-1}$

= $\frac{76}{8}$

= 9.5

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James estimated the total cost of groceries to be $50. The actual cost of the groceries is $65. What is the percent error? Round

Yuki888 [10]

The percentage error is 23%

Explanation:

The estimated total cost of the groceries = $50

The actual cost of the groceries = $65

To find the error value, we need to subtract the value of actual cost and total cost of the groceries.

Thus,

error value = actual cost - total cost

error value $= 65-50=15$

Hence, error value = $15

The formula to determine the percent error is given by

$Percent error $=\left(\frac{\text { error value}}{\text {actual value}}\right) \times 100$$

Substituting the values in the formula, we get,

$\begin{aligned} \text { Percent error } &=\left(\frac{15}{65}\right) \times 100 \\ &=0.231 \times 100 \\ &=23.1 \end{aligned}$

Rounding off the value, we have, 23%

Thus, the percentage error is 23%

6 0

4 years ago

PLEASE ANSWER QUICKLY Which expression represents the inverse of the matrix below?

Andre45 [30]

Answer:D

Step-by-step explanation:

7 0

3 years ago

A bag of candy includes pieces with different colors as shown in the table.

zvonat [6]

Part A: About 0.21

We will put the wanted outcome (yellow pieces of candy) over the total number of possible outcomes (total pieces of candy).

$\frac{5}{3+6+5+2+8}$

$\frac{5}{24}$

About 0.21

Part B: About 50

First we will do the same as we did with the yellow pieces of candy, wanted outcomes over possible outcomes.

$\frac{6}{3+6+5+2+8}$

$\frac{6}{24}$

0.25

Now, we will multiply the total 200 pieces by 0.25 since 0.25 of them are estimated to be green.

200 * 0.25 = 50

I estimate about 50 of the pieces to be green.

6 0

2 years ago

Can come one help me please :) thank you

natali 33 [55]

Step-by-step explanation:

Given

$( {x}^{2} ) ^{4} \\ = {x}^{2 \times 4} \\ = {x}^{8}$

Hope it will help :)

7 0

3 years ago

Read 2 more answers

1. Ifp=7,9 =-6, r = 10 and s=-4, calculate:

Ratling [72]

the answers as follows

a) 16 b) 13 c) 16 d) 46 e) -630 f) 18 g) -32 h) 50 i) -6 j)38 l)61

Step-by-step explanation:

a) p + 9 = 7 + 9 = 16

b) p - s = 7 - (-4) = 7 + 4 = 13

c) r - q = 10 - (-6) = 16

d)q + 52 = -6 + 52 = 46

e) pqr = 7 X (-6) X 10 = -630

f) r + 8 = 10 + 8 = 18

g) pq + r = 7 X (-6) + 10 = -42 + 10 = -32

h) r - qs = 10 - (10 X (-4))= 10 + 40 = 50

i) 3r + 6q = 3 X 10 + 6 X (-6) = 30 - 36 = -6

j) 59 - 3p = 59 - 3 X 7 = 59 - 21 = 38

k) check your question

l) 4q + 85 = 4 x (-6) + 85 = -24 + 85 = 61

4 0

4 years ago

Read 2 more answers