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Rzqust [24]
3 years ago
5

Solve by factorising x? + 8x + 15 = 0

Mathematics
1 answer:
vodka [1.7K]3 years ago
5 0

Answer:

x=-15/8 or -1 7/15 OR x=-5/3 or -1 2/3

Step-by-step explanation:

Subtract 15 from both sides

8x=-15

Divide 8 on both sides

Now you get your answer

x=-15/8 or -1 7/15

OR

Combine like terms

9x+15=0

Subtract 15 from both sides

9x=-15

Divide 9 from both sides

x=-15/9

Simplify

x=-5/3 or -1 2/3

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The control group in an experiment is the group that did not have a variable changed.
Amiraneli [1.4K]
The answer is
true.
4 0
4 years ago
2w^2-11w=-12 <br> a w=3/2 or 4<br> b w=1 or 12<br> c w=1 or 7<br> d w = 2.5 or 6
dlinn [17]
Hey mate !!
Here's your answer !!


2w^2 - 11w = -12
2w^2 -11w + 12 = 0
2w^2 - 8w - 3w + 12 = 0

2w ( w - 4) -3 ( w - 4) = 0
(2w - 3) ( w - 4) = 0

Hence

2w - 3 = 0
2w = 3
w = 3/2

w - 4 = 0
w = 4

Hence value of w are 4 and 3/2

Hope this helps!!
Cheers!!
7 0
4 years ago
Pls pls help it would be very helpful​
liubo4ka [24]

Answer:

111

Step-by-step explanation:

if angle 8 and angle 4 are equal, then angle 8 and angle 5 are equal

so... angle 5= angle 4

3 0
4 years ago
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SpyIntel [72]

Answer:

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4 0
3 years ago
How is using mental math to add with decimals like using mental math to add whole numbers? How is it different?
zhuklara [117]
Well you use the same process really. Taking the individual numbers, lining them up and adding them. However, it is much more difficult because there is more to remember and you have to carry over more numbers. <span />
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