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Sunny_sXe [5.5K]
3 years ago
8

9 Four students were asked to write an expression that is

Mathematics
1 answer:
BabaBlast [244]3 years ago
8 0

Answer:

Step-by-step explanation:

8x - 20.....factor a 4 out

4(2x - 5) <=== this one is correct...not 100% sure who wrote it

8x - 20...factor out a 2

2(4x - 10) <==== this is correct

8x - 20....factor out a -2

-2(-4x + 10) <==== this is correct

8x - 20....factor out a -4

-4(-2x + 5).....nobody did this one......but somebody tried....that person didn't factor correctly

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5[x-3(x-3)]<br> Simplify
katen-ka-za [31]

Answer:

=−10x+45

Step-by-step explanation:

5(x−3(x−3))

=−10x+45

3 0
3 years ago
At the start of 2014 lucys house was worth ?200 000. The value of the house increased by 5% every year. Workout the value of her
Galina-37 [17]

Answer:

The value of Lucys house  at the start of 2017 is 231525.

Step-by-step explanation:

It is given that the initial value of Lucys house is 200,000. The  at the start of 2017.

The exponential function is defined as

P=P_0(1+r)^t

Where, P₀ is initial value, r is growth rate, t is time in years.

The value of house is defined by the function

P=200000(1+0.05)^t

Where, t is number of years after 2014.

P=200000(1.05)^t

The difference between 2017 and 2014 is 3 years.

P=200000(1.05)^3=231525

Therefore the value of Lucys house  at the start of 2017 is 231525.

3 0
3 years ago
I’m confused on what’s going on here, so if someone could explain it I would be super grateful.
pshichka [43]
<h2>Range of x </h2><h3>-\frac{1}{5} and x>6</h3><h3>Step-by-step explanation:</h3>

Given AB = 4x + 5, BC = 3x - 2 and AC 9x -5

The sum of the length of any two sides of a triangle is greater than the length of third side.

Case I

AB + BC > AC

⇔4x +5 +3x -2 > 9x -5

⇔7x + 3 >9x - 5

⇔ 7x -9x > -5 -3

⇔-2x > -8

⇔x <4

Case II

if AB+AC > BC

4x +5 +9x -5> 3x -2

⇔13x >3x -2

⇔ 13x -3x> -2

⇔10x > -2

⇔x >-\frac{1}{5}

Case III

AC+BC > AB

⇔9x - 5 +3x - 2 > 4x +5

⇔6x -7 > 4x +5

⇔6x -4x >5+7

⇔2x > 12

⇔x > 6

8 0
3 years ago
ZA and ZB are supplementary angles. If mZA = (5x + 25)° and m
liberstina [14]

Answer:

MZA = 140

Step-by-step explanation:

5x+25°+ x + 17°=180°(Supplimentary Angles)

6x + 42° =180°

6x =180 - 42

6x=138

(divide by 6 both sides)

X= 23

substitution X into the given angle

5x +25

5(23)+25

115+25

140

3 0
3 years ago
Sos ,, helpp please !!!
Serhud [2]
8) x represents the number of pounds of peanuts, and y represents the number of pounds of raisins

9) 
Solve:
x+2y=9
-2y    -2y
x=9-2y

2(9-2y) + 3y=14
18-4y+3y=14
-18            -18
-y=-4
y=4

x+2(4)=9
x+8=9
x=1


8 0
3 years ago
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