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Lena [83]
3 years ago
13

Katrina is asked to simplify the expression .

Mathematics
2 answers:
Lorico [155]3 years ago
8 0
The property of distribution
Burka [1]3 years ago
7 0

Answer:

Distribution property of Multiplication allows katrina to do this.

Step-by-step explanation:

The given expression is

-3a-4b-2(5a-7b)

Katrina simplify the above expression as

-3a-4b-2(5a)-2(-7b)

-3a-4b-10a+14b

She use the property

a(b+c)=ab+bc

This property is known as Distribution property of Multiplication.

Therefore Distribution property of Multiplication allows katrina to do this.

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Using the distributive property which of the following expressions is equivalent to 6(3+6y)
creativ13 [48]
18+36y is equal to that equation
8 0
3 years ago
Read 2 more answers
A square with unknown side length x has one side extended by 3 inches and the other side extended by 4 inches as shown. The area
natulia [17]

Answer:

(x + 3)(x + 4) = 110

or x² + 7x + 12 = 110

Step-by-step explanation:

4 0
2 years ago
What is the sum of 1/4 and 1/5?
krok68 [10]
To add them, you first need a common denominator.
So multiply <span> 1/4 by 5/5 and 1/5 by 4/4 first. 

Now they'll be 5/20 and 4/20. 

Add them to get 9/20. </span>
3 0
3 years ago
An athletic field is a 48 yd​-by-96 yd ​rectangle, with a semicircle at each of the short sides. A running track 20 yd wide surr
MA_775_DIABLO [31]

The distance would be equal to 2 times the longest side of the rectangle plus twice the shortest side multiplied by pi / 2 for the semicircle, that is:

longest side 96 and shortest 48

D = 2 * (96) + 2 * (1/2) * pi * 48

D = 192 + pi * 48

This shorter side, which starts at 48, will expand each time by two more in proportion to 20 of the running track between 8 than the number of divisions, that is, 2 * (20/8) = 5

In other words, there are 8 distances, like this:

D1 = 192 + 3.14 * 48 = 342.72 yd

D2 = 192 + 3.14 * (48 + 5) = 358.42 yd

D3 = 192 + 3.14 * (48 + 10) = 374.12 yd

D4 = 192 + 3.14 * (48 + 15) = 389.82 yd

D5 = 192 + 3.14 * (48 + 20) = 405.52 yd

D6 = 192 + 3.14 * (48 + 25) = 421.22 yd

D7 = 192 + 3.14 * (48 + 30) = 436.92 yd

D8 = 192 + 3.14 * (48 + 35) = 452.62 yd

6 0
2 years ago
Find three consecutive integers whose sum is 57????
Setler79 [48]

Answer:18 19 20

Step-by-step explanation:"Consecutive"  means that the integers will follow each other in value, for example:  1, 2, 3 or 4, 5, 6.  Also, no decimals are needed here because "integers" are whole, counting numbers. Here is the set up:   Let x= the first integer     Then    X+1= 2nd consecutive integer   and x+2= 3rd  .  

Suppose that x=1   x+1= 1+1=2   and x+2=1+2=3   However, you need specific consecutive numbers whose sum is 57.  Remember that sum means to add:

x+  (x+1)  + (x+2) = 57                 Addition of all 3 consecutive numbers   Now solve for x

                                                   and substitute into each part to come up with the three integers:

3x + 3= 57        3x=54               x=54/3  =  18            x=18,   x+1= 18+1=19      x+2=18+2=20

Check your answer:  18+19+20=57                 57=57  Check

7 0
3 years ago
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