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san4es73 [151]
3 years ago
12

Becca has 115 students. Susana has 8 fewer students than Becca. Erika has 25 more students than Susana. How many students does S

usana have? *
Mathematics
1 answer:
Olegator [25]3 years ago
4 0

Answer:

Susana will have 107 students.

Step-by-step explanation:

Becca have students = 115

  • Susana has 8 fewer students than Becca.

We can write its as:

Becca has 115 students, so Susana will have 115-8 = 107 students

Because fewer means less than so, 8 less than 115 is 115-8

  • Erika has 25 more students than Susana.

We can write it as:

Susana has 107 students, so Erika will have: 107+25 = 132 students.

because more means we need to add 25 students with number of students in Susana class.

So, Susana will have 107 students.

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Please someone help me quick!!!! It's about Domain and range, Please! Anyone!
BARSIC [14]

Answer:

Step-by-step explanation:

They already said the domain of f(x) is x≥0.

The smallest value of f(x) is f(0) = 9.

Range of f(x) is y≥9.

The radicand of a square root must be non-negative, so the domain of f⁻¹(x) is x≥9.

The range is y≥0.

8 0
3 years ago
PLEASEE HELP ILL GIVE BRAINLIEST
Semenov [28]

Answer:

HA pretty sure

Step-by-step explanation:

It shows that the Hypotenuse and the 45 degree angle is the same on both triangles.

6 0
3 years ago
The waiting times at a certain bank are normally distributed with a mean waiting time of 3.7 minutes and a standard deviation of
muminat

Answer:

From the given options we can say the correct answer is d.) 6.3

Step-by-step explanation:

The waiting times at the bank are given to be normally distributed.

The mean of the waiting time is given as  = 3.7 minutes

The given standard deviation is = 1.4 minutes

It is required to find the waiting time at the 97th percentile.

So we are required to find the time which can be said to be the waiting time which occurs with 97 % probability.

Let the time required be designated as y.

Therefore we can write p(X < y) = 0.97 (where 0.97 means the 97th percentile)

This is a left tailed test.

Using the formula from MSEXCEL to find y we get

y = NORMINV(0.97, 3.7, 1.4) = 6.333.

The other approach would to find the Z value corresponding to the probability value from the Z Table

The Z value for a probability of 0.97 gives us Z  = 1.881  .

Therefore \frac{y - 3.7}{1.4}  = 1.881. Therefore y = (1.881 × 1.4) + 3.7  = 6.33

Therefore from the given options we can say the correct answer is d.) 6.3

7 0
3 years ago
Rewrite 4/5 and 7/9 so they have a common denominator
sveticcg [70]

Answer:

36/45 and 35/45

Step-by-step explanation:

5 and 9's least common denominator is 45 and to get to that you need to multiply both top and bottom of how to get to 45. How I got to 45 the easiest way is to keep multiplying both numbers until the reach the same product. In this case for 4/5, you multiply it by 9 for top and bottom. And for 7/9, it would be multiplying by 5 for top and bottom which will get you both of the answers. Hopefully this answers your question.

7 0
3 years ago
At best buy they have a 42" TV that sells for $1250 and is on sale 15% and sales tax is 6%.What is the final cost?
Marat540 [252]
Ok so
sale is 15% off
and add 6% tax

100-15=85
100+6=106

therefor
1250 with 15% discount plus 6% tax means
1250 times 85% times 106% =
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final cost=$1126.25
4 0
3 years ago
Read 2 more answers
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