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2 years ago

A car moving at a constant speed passed a timing device at t = 0. After 8 seconds, the car has

Mathematics

1 answer:

maksim [4K]2 years ago

5 0

Answer:answer d

Step-by-step explanation:

i just did the test

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What is the slope of a line perpendicular to the line whose equation is

mezya [45]

Answer:

The slope of the other line is -4/5

Step-by-step explanation:

In this question, we are asked to calculate the slope of a line which is perpendicular to the line ;

10x - 8y = -80

The first thing to do here is to write the equation in the standard form for a linear equation.

The standard form is y = mx + c where m refers to the slope and c refers to the y-intercept

Rewriting the equation we have;

8y-80 = 10x

8y = 10x + 80

Now divide the through by 8

We have;

y = 10x/8 + 10

Thus, comparing with y = mx + c , our m here is 10/8

Now for the two lines to be perpendicular, the product of their slope would be equals to -1

Let’s say the slopes are m1 and m2

mathematically m1m2 = -1

since m1 = 10/8

10m2/8 = -1

m2 = -8/10

m2 = -4/5

7 0

2 years ago

How much will you pay the cashier for a candy bar that originally costs 79 cents and is now marked 15% off? Sales tax is 5.5%

Assoli18 [71]

79 cents marked down 15%
so
79 x (1 - 0.15)
79 x 0.85 = 67 cents
plus Sales tax is 5.5%

67 x (1.055) = 71 cents

answer
71 cents

6 0

3 years ago

Greg made the dart board shown. It is divided into equal sections. A dart is randomly thrown and lands on the board.

enyata [817]

Answer:

Step-by-step explanation:

8 0

2 years ago

What is the volume of the cone below? ):

svetoff [14.1K]

Answer:

A. 112π units³

General Formulas and Concepts:

Symbols

π (pi) ≈ 3.14

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Geometry

Volume of a Cone Formula: $\displaystyle V = \frac{1}{3} \pi r^2h$

r is radius
h is height

Step-by-step explanation:

Step 1: Define

Radius r = 4

Height h = 21

Step 2: Find Volume

Substitute in variables [Volume of a Cone Formula]: $\displaystyle V = \frac{1}{3} \pi (4)^2(21)$
Evaluate exponents: $\displaystyle V = \frac{1}{3} \pi (16)(21)$
Multiply: $\displaystyle V = \frac{16 \pi}{3}(21)$
Multiply: $\displaystyle V = 16 \pi \cdot 7$
Multiply: $\displaystyle V = 112 \pi$

8 0

2 years ago

-4x=-12 solve for x please

noname [10]

Answer:

X= 3

Step-by-step explanation:

If you divide -12 and -4 the product is 3

6 0

2 years ago

Read 2 more answers