3 years ago

Really easy 1/2 divided by -2/5

Mathematics

1 answer:

belka [17]3 years ago

4 0

Answer:

5/-4

Step-by-step explanation:

use the keep change flip method. first keep the 1/2. then change the division to multiplication. finally flip the -2/5 to 5/-2. solve to get 5/-4

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Find the sum of 1st 18 terms of an AP whose nth term is 3-2n.

cricket20 [7]

Answer:

-288

Step-by-step explanation:

<h3>Given AP</h3>

t(n) = 3 - 2n

The sum of first 18 terms

<h3>Solution</h3>

Sn = 1/2n(t(1) + t(n))

<u>The first and 18th terms as per the formula</u>

t(1) = 3 - 2 = 1
t(18) = 3 - 18*2 = 3 - 36 = -33
S18 = 1/2*18(1 - 33) = 9*(-32) = -288

<u>Answer is</u> -288

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3 years ago

-3x+ 20= 4x -22 what does value of x in the following equation equal

Anvisha [2.4K]

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3 years ago

A line passes through the points (4, 3) and (- 2, 1) . The slope of this line in simplest form is

lawyer [7]

Answer:

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

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

<u>Algebra I</u>

Slope Formula: $m=\frac{y_2-y_1}{x_2-x_1}$

Step-by-step explanation:

<u>Step 1: Define</u>

Point (4, 3)

Point (-2, 1)

<u>Step 2: Find slope </u><em><u>m</u></em>

Substitute: $m=\frac{1-3}{-2-4}$
Subtract: $m=\frac{-2}{-6}$
Simplify: $m=\frac{1}{3}$

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3 years ago

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Table 8 shows the values of two variables, x and y, obtained from an experiment. Variables x and y are related by the equation y

dsp73

Answer:

TABLE 8

Step-by-step explanation:

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