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BigorU [14]
3 years ago
8

What is the product of 40 and 7?

Mathematics
1 answer:
Blizzard [7]3 years ago
3 0
Product of 40 and 7 is 280
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Karen earns $5 by delivering newspapers each week. She saves $3 and she spends the rest. How many weeks will it take her to save
8090 [49]

Answer:

12 Weeks.

( Is this what you were asking for? <3 )

5 0
3 years ago
How many real roots and how many complex roots does this expression have?<br> (x+7)^7
Feliz [49]

Answer:

One real root, with multiplicity 7.

Step-by-step explanation:

The given expresion is

{(x + 7)}^{7}

This is a seventh degree polynomial.

According to the fundamental theorem of Algebra, the expression has a potential 7 roots both real and complex.

This expression has one real root, with multiplicity , 7.

3 0
3 years ago
In his first year, a math teacher earned $32,000. Each successive year, he
Ivan

Answer:

Step-by-step explanation:

Each successive year, he

earned a 5% raise. It means that the salary is increasing in geometric progression. The formula for determining the nth term of a geometric progression is expressed as

Tn = ar^(n - 1)

Where

a represents the first term of the sequence(amount earned in the first year).

r represents the common ratio.

n represents the number of terms(years).

From the information given,

a = $32,000

r = 1 + 5/100 = 1.05

n = 20 years

The amount earned in his 20th year, T20 is

T20 = 32000 × 1.05^(20 - 1)

T20 = 32000 × 1.05^(19)

T20 = $80862.4

To determine the his total

earnings over the 20-year period, we would apply the formula for determining the sum of n terms, Sn of a geometric sequence which is expressed as

Sn = (ar^n - 1)/(r - 1)

Therefore, the sum of the first 20 terms, S20 is

S20 = (32000 × 1.05^(20) - 1)/1.05 - 1

S20 = (32000 × 1.653)/0.05

S20 = $1057920

3 0
3 years ago
Rewrite each problem so that x appears on only one side
Vlad1618 [11]

Answer:

x = -5/21

Step-by-step explanation:

Step 1: Write equation

2(12x - 1) = (21x - 49)/7

Step 2: Solve for <em>x</em>

  1. Multiply both sides by 7: 14(12x - 1) = 21x - 49
  2. Distribute 14: 168x - 14 = 21x - 49
  3. Subtract 21x on both sides: 147x - 14 = -49
  4. Add 14 to both sides: 147x = -35
  5. Divide both sides by 147: x = -5/21
5 0
3 years ago
PLZ HELP WILL GIVE BRAINLIEST!!!!!
Gnesinka [82]
The answer would be 198/300. That simplified would be 33/50. If you want a percent, it would be 66%.
6 0
3 years ago
Read 2 more answers
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