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asambeis [7]
4 years ago
12

3/4 + (1/3 ÷ 1/6) - (-1/2) =

Mathematics
1 answer:
Aleonysh [2.5K]4 years ago
4 0
The answer is 13/14
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That's the last one because you can factor to get

(x + 8)^2 = 36

(x + 8) = +/- 6
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4 years ago
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Need help understanding!!!!
NNADVOKAT [17]

Answer:

Step-by-step explanation:

The two angles are formed from 2 intersecting lines. The angles are called vertically opposite angles. They are equal

4x + 21 = 85                    Subtract 21

4x = 85 - 21                    Combine

4x = 64                           Divide by 4

x = 64/4

x = 16

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3 years ago
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Sophie [7]
1)100 or A
Angle = |30*H - (11/2)*M|, where H is the hours hand and M is the minutes hand

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7 0
4 years ago
Two chemical companies can supply a raw material. The concentration of a particular element in this material is important. The m
svp [43]

Answer:

As the calculated F lies in the acceptance region therefore we conclude that there is not sufficient evidence to support the claim that the variability in concentration may differ for the two companies. Hence Ha is rejected and H0 is accepted.

Step-by-step explanation:

As we suspect the variability of concentration F - test is applied.

n1=10    s1=4.7

n2=16      s2=5.8

And α = 0.05.

The null and alternate hypothesis are

H0: σ₁²=σ₂²       Ha:  σ₁²≠σ₂²

The null hypothesis is  the variability in concentration does not  differ for the two companies.

against the claim

the variability in concentration may differ for the two companies

The critical region F∝(υ1,υ2) = F(0.025)9,15= 3.12

and 1/F∝(υ1,υ2) = 1/3.77= 0.26533

where υ1= n1-1= 10-1= 9 and υ2= n2-1= 16-1= 15

Test Statistic

F = s₁²/s₂²

F= 4.7²/5.8²=0.6566

Conclusion :

As the calculated F lies in the acceptance region therefore we conclude that there is not sufficient evidence to support the claim that the variability in concentration may differ for the two companies. Hence Ha is rejected and H0 is accepted.

3 0
3 years ago
Tay-Sachs disease is a genetic disorder that is usually fatal in young children. If both parents are carriers of the disease, th
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Lo siento mucho, necesito los puntos porque estoy en una prueba.

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