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Pavlova-9 [17]
3 years ago
5

Factorise 3x^2-22x+7

Mathematics
1 answer:
Svet_ta [14]3 years ago
3 0

Answer:

(3x+7)(x+5)

Step-by-step explanation:

i think lol

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How quickly do synthetic fabrics such as polyester decay in landfills? A researcher buried polyester strips in thes oil for diff
ad-work [718]

Answer:

no enough evidence to draw up a conclusion

Step-by-step explanation:

Data:

let: \mu _{1} = decay after 2 weeks

    \mu _{2} = decay after 16 weeks

Making the hypotheses:

Null hypothesis; H_{o} = \mu _{1}  - \mu _{2} = 0

the deviation = 0.05

the standard difference  = 4

Conditions:

The normal distribution curve can be plotted on a graph and the plot shows that the distribution is a skewed distribution.

Then,

t = \frac{(123.8-16.4)-0}{\sqrt{\frac{4.6^{2} }{5}+\frac{16.09^{2} }{5}   } } \\  = 0.989

Therefore, it can be concluded that 0.1983 > 0.05. This presents our failure to reject the null hypothesis.

Thus, there is not enough evidence to conclude that polyester decays more in less than 2 weeks.

5 0
3 years ago
Chloe ate 10 grapes and 5 crackers. Layla ate 5 grapes and 10 crakers. Who ate more food items? Write a number sentence. Then id
a_sh-v [17]
10+5=5+10
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Commutative Property of Addition is used. 
8 0
3 years ago
Please help me! and explanation on how you got it please
Igoryamba

Answer:

Step-by-step explanation:

This is a right angled triangles and the summation of the other two angles must equal 90°

OR you can also say that the summation of all the angles in a ∆ must give us 180°

Therefore (2x+14) + (4x-26) = 90°

Expanding... By collecting all like terms, we have

2x+4x+14-26-90 = 0

6x - 102° = 0

Therefore, 6x = 102

x = 102/6

x = 17°

5 0
3 years ago
Which numbers are rational? select all that apply. A. pi B. √50 C. 2.3 D. √144
aev [14]
C. 2.3
D.√144


Rational roots or decimals are numbers that have an end point. 

pi 'technically' never ends, while √50 = 7.07106781<span>…, which never ends either
</span>

hope this helps
5 0
3 years ago
Read 2 more answers
You can ride your bike around your block twice and the whole neighborhood once in 10 minutes. You can ride your bike around your
Bond [772]
I THINK,4=31
1=?
(1*31)/4=x
X=31/4
X=7.75minute to ride around the neighborhood once
It may not be correct
6 0
2 years ago
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