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3 years ago

9

7-(-9)-18+(-19)+18.

2 answers:

Travka [436]3 years ago

6 0

Answer:

-3

Step-by-step explanation:

7 - (-9) - 18 + (-19) +18

Remove the opposites

Remove the parentheses

7 + 9 - 19

Calculate

hammer [34]3 years ago

5 0

Answer:

The answer is -3

Step-by-step explanation:

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What is the value of the expression 8p4

Nady [450]

ANSWER

$8P_4 = 1680$

EXPLANATION

We use the formula

$nP_r = \frac{n!}{(n - r)!}$

For

$8P_4$

and n=8, r=4.

$8P_4= \frac{8!}{(8- 4)!}$

This simplifies to

$8P_4= \frac{8!}{4!}$

We expand the numerator using factorial notation,

$8P_4= \frac{8 \times 7 \times 6 \times 5 \times 4!}{4!}$

The common factors cancel out.

$8P_4= 8 \times 7 \times 6 \times 5$

$8P_4= 1680$

3 0

3 years ago

A 2,000 loan has an annual internet rate of 4.5% on the amount borrowed. How much time has elapsed in the interest is now $180?

Jlenok [28]

Answer:

2 years

Step-by-step explanation:

90 in 1 year, 180 in 2 years

6 0

4 years ago

Maths watch help me please thank you

Dovator [93]

Answer:

71 %

Step-by-step explanation:

Paper 1 :

65% of 120 = 0.65 X 120 = 78

Paper 2 :

80% of 80 = 0.8 X 80 = 64

Total Percentage:

Add the two scores 78 + 64 = 142

Add the what it was out of 120 + 80 = 200

Use (Score / Total marks available) X 100

(142 / 200) X 100 = 71

3 0

3 years ago

45/84 is it in simplest form

balandron [24]

The simplest form is 15/28
Correct me if I'm wrong. Hope this helps!

3 0

3 years ago

Given j(x) = x + 5, what is the value of j(12)?

yarga [219]

Answer:

j(12) = 17

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

<u>Algebra I</u>

Function Notation

Step-by-step explanation:

<u>Step 1: Define</u>

j(x) = x + 5

j(12) is x = 12

<u>Step 2: Evaluate</u>

Substitute in <em>x</em>: j(12) = 12 + 5
Add: j(12) = 17

8 0

3 years ago

Read 2 more answers