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Reil [10]
3 years ago
9

Simplify the expression (5.8f - 3g + g)-(7f - 2.5g)

Mathematics
1 answer:
Vlad1618 [11]3 years ago
5 0

(5.8f - 3g + g) - (7f - 2.5g)

(5.8f - 4g) - (7f - 2.5g)

2.8f - 2.5g

Answer:

2.8f - 2.5g

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You are a policy maker who is concerned with low standardized-test scores in high schools in your school district. You are inter
kap26 [50]

Answer:

The estimated impact of the experiment of offering test preparation classes is:

= 8 scores (in performance improvement).

Step-by-step explanation:

Average standardized-test score for the first 10 high schools = 69

Average standardized-test score for the second 10 high schools = 70

After 6 months:

Average standardized-test score for the first 10 high schools offered test preparation classes = 78

The change in the average standardized-test score for the first 10 high schools = 9 (78 - 69)

Average standardized-test score for the second 10 high schools not offered test preparation classes = 71

The change in the average standardized-test score for the second 10 high schools not offered the prep = 1 (71 - 70)

The estimated impact of the experiment of offering test preparation classes is:

= 9 - 1  

= 8.

8 0
3 years ago
For the trinomial x^2-11x+10 determine if the factors of c will will be both positive, both negative, or opposite signs.
IrinaVladis [17]

Answer:

Two negatives

Step-by-step explanation:

I'm assuming by 'factors of c' you mean factors of the last term. For the entire trinomial, we know that there are two negative signs. To be able to get a negative 11x and then a positive 10, we would need two negatives, since two negatives equal a positive. Hope that helps!

5 0
3 years ago
the depth D, in inches, od wsnow in my yard t hours after it started snowing this morning is given by D=1.5t + 4. if the depth o
Blababa [14]

Answer:

8.5 inches

Step-by-step explanation:

First let's find the time t when the depth of the snow is 7 inches.

To do this, we just need to use the value of D = 7 then find the value of t:

7 = 1.5t + 4

1.5t = 3

t = 2\ hours

We want to find the depth of snow one hour from now, so we just need to use the value of t = 3 to calculate D:

D = 1.5*3 + 4

D = 4.5 + 4 = 8.5\ inches

The depth of snow one hour from now will be 8.5 inches.

7 0
3 years ago
19/10 into a mixed or whole number?? How would you work this out? i need help.
azamat

10 out of 10 equals 1.

then there is 9 left.

This gives 1 and 9 over 10.

9 over ten is not a whole number as 10 over ten is.

Hope this helps.


5 0
3 years ago
Read 2 more answers
Two teaching methods, A and B, are implemented for learning Spanish. There is a 70% chance of successfully learning Spanish if m
Mkey [24]

Answer:

(a) Shown below.

(b) Shown below.

(c) The probability that a person does not learn Spanish is 0.18.

(d) The probability that method B was used given that a student learned the Spanish successfully is 0.83.

Step-by-step explanation:

(a)

Consider the provided data.

P(A)=0.20\\P(B)=0.80\\P(L|A)=0.70\\P(L|B)=0.85

Then the probability of not learning Spanish using the respective methods are:

P(L'|A)=1-P(L|A)=1-0.70=0.30\\\\P(L'|B)=1-P(L|B)=1-0.70=0.15

(b)

The Probability Tree representing each of the probabilities mentioned above is attached below.

(c)

Compute the probability that a person does not learn Spanish as follows:

P(L')=P(L'|A)P(A)+P(L'|B)P(B)

         =(0.30\times 0.20)+(0.15\times 0.80)\\\\=0.06+0.12\\\\=0.18

Thus, the probability that a person does not learn Spanish is 0.18.

(d)

Compute the probability that method B was used given that a student learned the Spanish successfully as follows:

P(B|L)=\frac{P(L|B)P(B)}{P(L|A)P(A)+P(L|B)P(B)}

            =\frac{(0.85\times 0.80)}{(0.70\times 0.20)+(0.85\times 0.80)}\\\\=\frac{0.68}{0.14+0.68}\\\\=0.82927\\\\\approx 0.83

Thus, the probability that method B was used given that a student learned the Spanish successfully is 0.83.

3 0
3 years ago
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