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Nitella [24]
2 years ago
15

Does anyone know any other good apps for math like Algebra 1.?

Mathematics
2 answers:
vesna_86 [32]2 years ago
8 0
Malmath is really good app too and it works offline.
Novay_Z [31]2 years ago
7 0
Photomath is a good one. So is KhanAcademy, but I don't know if they have an app version of the website.
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The quadratic equation 2x^2+4x-30=0 has two solutions. one of the solutions is x=3 the other solution is?
BartSMP [9]

Answer:

2x^2+4x-30=0

Step-by-step explanation:

2x^2+10x-6x-30=0

2x(x+5)-6(x+5)=0

(2x-6)(x+5)=0

2x-6=0        x+5=0

x=6/2          x=-5

x=3

6 0
2 years ago
Read 2 more answers
A toy maker claims his best product has an average lifespan of exactly 14 years. A skeptical quality control specialist asks for
slamgirl [31]

Answer:

interval = [17.3948 , 20.6052]

Step-by-step explanation:

given,

random sample (n) = 45

average product lifespan = 19 years

standard deviation = 4 years

confidence interval of 99 %  = ?

we know,

t* = qt(1.99/2 + 44 ) = qt(0.995,44)

t* = 2.692

so,

interval

x = 19 \pm t* \times (\dfrac{s}{\sqrt{n}})

x = 19 \pm 2.692 \times (\dfrac{4}{\sqrt{45}})

x = 19 \pm 2.692 \times 0.5963

x = 19 \pm 1.6052

interval = [19 - 1.6052 , 19 + 1.6052]

interval = [17.3948 , 20.6052]

4 0
3 years ago
I need help finding the slope with work tho please
Hatshy [7]

Answer:

first is 2/5

second is -2

7 0
2 years ago
Solve 2x – 7 > 11.
BaLLatris [955]

Answer:

x > 9

Step-by-step explanation:

2x - 7 > 11

2x > 18

x > 9

5 0
3 years ago
There are 144 animals at a pet store. 56 are cats; the rest are dogs. what fraction of all of the animals are dogs?
svlad2 [7]
144 - 56 = 88

88/144 simplified to -----> 11/18
4 0
3 years ago
Read 2 more answers
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