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3 years ago

Translate this phrase into an algebraic expression 69 decreased by twice a number

Mathematics

1 answer:

Dennis_Churaev [7]3 years ago

8 0

Hey there!

First, let the unknown number mentioned be represented by the variable "x".

Now, since 69 is being decreased by a number identified as "twice" a number (x), you know that some number is being subtracted from 69. In addition, the number is twice an unknown value, x.

This would be represented by the algebraic expression:

69 - 2x

Hope this helps!

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in sub-Saharan African an estimated 28.5 million people are infected with AIDS. Unfortunately that number is rising. and it is e

Viktor [21]

Answer:

About 28,671,342 people

Step-by-step explanation:

This is compound growth problem. This goes by the formula:

$F=P(1+r)^t$

Where

F is the future amount (in 3 years)

P is the present amount (28.5 million)

r is the rate of growth (0.4% = 0.4/100 = 0.004)

t is the time in years (3 years)

We first, need to find the rate of growth annually. It is given 0.4% every 2 years, so in 1 year that would be:

0.4%/2 = 0.2% = 0.002

Now, we put the information into formula and solve:

$F=P(1+r)^t\\F=28500000(1+0.002)^3\\F=28500000(1.002)^3\\F=28,671,342$

So, around 28,671,342 people will be infected in 3 years.

8 0

4 years ago

Can someone please help me with this math problem I’m not good at math

77julia77 [94]

Answer:

x = z/2 - y/2

Step-by-step explanation:

5 0

2 years ago

Compare the following numbers 52,458 blank 52,485

skelet666 [1.2K]

52,458<52,485
52,485-52,458=27

8 0

4 years ago

Read 2 more answers

3x-4/2x-9 in interval notation

SCORPION-xisa [38]

Your answer is going to be 6 because 18 subtract 12 equals 6 hope you got this answer right

6 0

4 years ago

1. Check the divisibility of the following numbers by 2, 3, 9 and 11 a) 76543 b) 98765436

Alla [95]

Answer:

1. ( I didnt understand the question but I divided them using the calculator.)

A.) 76543

÷ 2= 38,271.5

÷ 3= 25,514.333...

÷ 9= 8,504.777...

÷ 11= 6,958.454545...

B.) 98765436

÷ 2= 49,382,718

÷ 3= 32,921,812

÷ 9= 10,973,937.333...

÷ 11= 8,978,676

2. B

A.) 67894

÷ 4= 16,973.5

÷ 8= 8,486.75

B.) 9685048

÷ 4= 2,421,262

÷ 8= 1,210,631

Explanation:

I used the calculator to divide.

I hope this helps! I'm sorry if it's wrong.

6 0

4 years ago