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3 years ago

PLEASE HELP!! I WILL GIVE BRAINLIEST!!

Mathematics

1 answer:

ollegr [7]3 years ago

8 0

Answer:

13-Aug-2017 · 2 answers

A ball is dropped from a vertical height of 40 ft. Each time the ball bounces, it loses energy and only returns to a height that is 80% of the previous

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Solve the inequality and state the answer in interval notations 3x-7 ≤ 14

emmainna [20.7K]

Answer:

Step-by-step explanation:

3x-7 ≤ 14

3x≤ 14+7

3x≤ 21

x≤ 21/3 = 7

=> x = (-∞;7]

That means that x can be any negative number and any positivi number (1,2,3...7)

4 0

3 years ago

exis [7]

Answer:

Part 1) The length of the longest side of ∆ABC is 4 units

Part 2) The ratio of the area of ∆ABC to the area of ∆DEF is $\frac{1}{100}$

Step-by-step explanation:

Part 1) Find the length of the longest side of ∆ABC

we know that

If two figures are similar, then the ratio of its corresponding sides is proportional and this ratio is called the scale factor

The ratio of its perimeters is equal to the scale factor

Let

z ----> the scale factor

x ----> the length of the longest side of ∆ABC

y ----> the length of the longest side of ∆DEF

$z=\frac{x}{y}$

we have

$z=\frac{1}{10}$

$y=40\ units$

substitute

$\frac{1}{10}=\frac{x}{40}$

solve for x

$x=(40)\frac{1}{10}$

$x=4\ units$

therefore

The length of the longest side of ∆ABC is 4 units

Part 2) Find the ratio of the area of ∆ABC to the area of ∆DEF

we know that

If two figures are similar, then the ratio of its areas is equal to the scale factor squared

Let

z ----> the scale factor

x ----> the area of ∆ABC

y ----> the area of ∆DEF

$z^{2}=\frac{x}{y}$

we have

$z=\frac{1}{10}$

$z^2=(\frac{1}{10})^2$

$z^2=\frac{1}{100}$

therefore

The ratio of the area of ∆ABC to the area of ∆DEF is $\frac{1}{100}$

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3 years ago

Which diagram shows the medians of a triangle? triangle 1 triangle 2 triangle 3 triangle 4

ki77a [65]

Answer————————-triangle 3
Hope this helps!!

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3 years ago

Evaluate the expression 72/x2-2 for x=3

Rzqust [24]

Answer:46

Step-by-step explanation:

7 0

3 years ago

Help please:((( p.s the last word is bill

zalisa [80]

Each egg is a 1$.49 so add 2 which will be $3.48 then add $1.49 gfor the bacon which will be 5.33 then 1.09 which will be $6.42 then add tax so 6.90 is her total and subtract 10$ from 6.90 she got 3.10 in change

8 0

3 years ago

Read 2 more answers