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IgorC [24]
3 years ago
6

What is a division problem involving the division of a decimal by a whole number with an estimate of 7

Mathematics
1 answer:
Dafna11 [192]3 years ago
4 0
28 divided by 4 maybe
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Using a minimum of two sentences, describe how to write the function, f(x) = (x + 2)^2 - 3, in standard form.
Lostsunrise [7]
First, simplify the (x+2)(x+2) with FOIL:
f(x)=(x^{2} +2x+2x+4)-3
Combine like terms
f(x)=x^{2} +4x+1
Then you have standard form.

Hope that helps.
3 0
3 years ago
Phyllis invested 50000 dollars, a portion earning a simple interest rate of 5 percent per year and the rest earning a rate of 7
Elodia [21]

Answer:

The amount invested at 5% was $39,000 and the amount invested at 7% was $11,000

Step-by-step explanation:

we know that

The simple interest formula is equal to

I=P(rt)

where

I is the Final Interest Value

P is the Principal amount of money to be invested

r is the rate of interest  

t is Number of Time Periods

Let

x-----> the amount invested at 5%

50,000-x -----> the amount invested at 7%

so

t=1\ year\\ I=\$2,720\\r_1=0.05\\r_2=0.07\\P_1=\$x\\P_2=\$(50,000-x)

substitute in the formula above

2,720=x(0.05*1)+(50,000-x)(0.07*1)

solve for x

2,720=0.05x+3,500-0.07x

0.07x-0.05x=3,500-2,720\\0.02x=780\\x=\$39,000

(50,000-x)=\$11,000

therefore

The amount invested at 5% was $39,000 and the amount invested at 7% was $11,000

5 0
4 years ago
Mary bought a pair of jeans on sale for 25% off. The original price for jeans was $79. What was the sale price before tax? Expla
TEA [102]
<h3>Answer:  $59.25</h3>

========================================================

Explanation:

There are two approaches

Method 1

25% of 79 = 0.25*79 = 19.75

Mary saves $19.75 and the price before tax is 79 - 19.75 = 59.25

-----------------------------

Method 2

She saves 25% so she must pay the remaining 75%

75% of 79 = 0.75*79 = 59.25

This is a slight shortcut, and it's very useful when it comes to chaining multiple discounts together.

5 0
3 years ago
10 computer operators can compose 120 pages in 2 hours. How many operators should work, if the same job is to be completed in 30
cupoosta [38]

Answer:

40 Operators

Step-by-step explanation:

if 10 operators worked on 120 pages for 2 hours

P operators will work on the same pages for 30min

note: 2hrs= 120min

10×120min/120= P × 30/120

  • cross multiply
  • make P subject of the formula

P= 10×120×120/120×30

P = 40 operators

6 0
3 years ago
Find the mean absolute deviation of the set of data. 6, 6, 8, 10, 10
Ratling [72]

Answer: 1.6 is the answer :)

Step-by-step explanation:

5 0
3 years ago
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