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Reika [66]
3 years ago
14

Factorise each of the following expressions a) x2 + 5x + 6 d) z2 + 8z + 12

Mathematics
1 answer:
CaHeK987 [17]3 years ago
3 0

Answer:

a)x2+5x+6

x2+(3+2)x+6

x2+3x+2x+6

x(x+3)+2(x+3)

(x+3)(x+2)

b)z2+8z+12

z2+(6+2)z+12

z2+6z+2z+12

z(z+6)+2(z+6)

(z+6)(z+2)

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the cost of an annual tuition at a university increased from 10,500 to 11,300 what is the percent increase in tuition to the nea
Maurinko [17]
Percent increase
find increase first
10500 to 11300
11300-10500=800
so
percent increase
change/original
origianal=10500
change=800
800/10500=8/105=0.0761
percent means parts out of 100
0.0761/1 times 100/100=7.61/100=7.61%

rond 7.61% to tenth or to 7.6%

7.6%

5 0
3 years ago
Solve for x..........................
Lelechka [254]

Answer:

3

Step-by-step explanation:

If your talking about the x where it says 3x in, then

3x = 9

x = 3

4 0
2 years ago
Jenny bought gas for her car. Gas cost $3.45 per gallon. She bought 12.2 gallons for her car. What was the total cost of gas for
Greeley [361]

Answer:

Gas prices $3.45

Jenny purchase 12.2 gallons of gas for her car.

12.2 x $3.45 = 42.09

A= $42.09

3 0
3 years ago
A bicycle that usually sells for $230 is on sale for 25% off. find the sale price.
Vera_Pavlovna [14]

Answer:

$172.50

Step-by-step explanation:

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8 0
3 years ago
Solve using elimination 5x+7y=9 <br> 2x-3y=-37
uranmaximum [27]

Answer:

x = -8

y = 7

Step-by-step explanation:

5x + 7y = 9

2x - 3y = -37

1.) First, multiply each side to match either y-values or x-values. (In this example, we'll use match x-values)

10x + 14y = 18 (multiplied by 2)

10x - 15y = -185 (multiplied by 5)

2.) Then, subtract the entirety of one equation to isolate the y-value.

10x + 14y = 18

-10x + 15y = 185

3.) Add and subtract values and divide to find y.

29y = 203

y = 7

4.) Plug-in y to solve for x into one equation, or repeat steps 1-3.

15x + 21y = 27

14x - 21y = -259

29x = -232

x = -8

4 0
2 years ago
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