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dusya [7]
3 years ago
14

Please help, I’ll mark you as brainliest!!!!!

Mathematics
2 answers:
kolezko [41]3 years ago
6 0

Answer:10

Step-by-step explanation:

Mama L [17]3 years ago
4 0

Answer:

I believe it's D.

Step-by-step explanation:

$40 - 25÷100 = $39.75

$39.75 - $5.00 = $34.75

$34.75 - $2 = $32.75.

not confident with my answer though.

hope it helps. :)

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Two numbers total 42 and have a difference of 8 find the two numbers
FinnZ [79.3K]
X+y = 42
x-y = 8
x = 8+y

Substitute it in 1st equation,
8+y+y=42
2y = 34
y = 17

Substitute it in 1st eq.,
x = 42-17 = 25

So, the two numbers are 25 & 17

Hope this helps!

5 0
3 years ago
Three students wrote expressions on their dry-erase boards.
OlgaM077 [116]

Answer:

Student 2 and Student 3

Step-by-step explanation:

Student 2

-(5r - 3s + 1)

= - 5r +3s - 1

Student 3

= - 5r +3s - 1

3 0
2 years ago
Cards are dealt, one at a time, from a standard 52-card deck. a if the first 2 cards are both spades, what is the probability th
ratelena [41]
So we already drew two cards and both of them are spades. So that means there are 50 cards and 11 spades left.

Then third card being spades would be 11 / 50

Now there are 10 spades and 49 cards left.
So the probability for fourth card would be 10 / 49

Fifth card would be 9 / 48.

So the probability of next three cards being spades would be
\dfrac{11}{50}\cdot\dfrac{10}{49}\cdot\dfrac9{48}=\dfrac{33}{3920}\approx\boxed{0.00842}

Hope this helps.
3 0
3 years ago
John commutes each day to work either by train or by bus. The bus pass costs 10$ plus 2$ per trip. The train costs 15$ plus 1.50
babunello [35]

Answer:

a

Step-by-step explanation:

i plugged in each of the numbers to the equation

at 9 trips the bus costs 28 and train cost 25.5

5 0
3 years ago
Can you conclude with a high degree of confidence that the population means for Iowa and New Jersey students are​ different? A.
Katen [24]

Complete Question

The complete question is  shown on the first uploaded image

Answer:

Option A is correct

Step-by-step explanation:

From the question we are told that  

  The  95% confidence interval of the mean  score of all  New Jersey third graders  is  (58.957 ,  63.043)

   The sample size is  n =  184

   The sample average is  \mu = 65 \ points

   The standard deviation is   \sigma  =  13 \ points

    The  90%  confidence interval for the difference in mean score between lowa and New Jersey is  (-6.33 ,  -1.67 )

   The  p-value is  p-value  =  0.0048

Generally given that the p-values is very low compared to the level of significance (100 -90 =  10% = 0.10 )  we can reject the null hypothesis which is usually a  claim that the means of the  population are the same )

Hence the population means are different .

6 0
3 years ago
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