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postnew [5]
3 years ago
13

2t−5=−10 what is t I really need help

Mathematics
2 answers:
geniusboy [140]3 years ago
8 0
2t - 5 = -10
2t = -10 + 5
t = -5/2

In short, Your Answer would be -5/2

Hope this helps!
Galina-37 [17]3 years ago
5 0
t = -2.5 or -\frac{5}{2}

Here's how we find that out:

2t -5 = -10..........................We need to get the variable, t, by itself

2t = -5................................Add 5 to both sides

t = -2.5...............................Divide both sides by 2

So, your answer is - \frac{5}{2} 0r -2.5

I hope this helped! Have a great day! :))
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C=25x+.10
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2 years ago
You roll a standard number cube. Find P(number greater than 1).
sesenic [268]
Well if its a standard die then the numbers on the die would be 1,2,3,4,5,6.  Since you want the probability that the number is GREATER than 1, you need to roll a 2,3,4,5, or 6.  Which you have 5 total outcomes that would be successful out of 6.  Makes the probability 5/6 or .833333
6 0
3 years ago
Imagine that the intelligence test score (M=100, SD =15) is perfectly correlated with SAT score. Your Z score on SAT is +1.0, yo
Oksanka [162]

Answer:

115

Step-by-step explanation:

Given :

Mean of intelligence score = 100

Standard deviation of intelligence score = 15

Since both are perfectly correlated,

The Zscore ON SAT = +1.0

Using the standard normal interpretation, Xcore on SAT of +1.0 means 1 standard deviation to the right

This means :

Mean + 1 standard deviation

100 + 1*15

= 115

We could use the Zscore formula directly too:

Zscore = (x - mean) / standard deviation

Zscore = +1 ; x = score

Hence, we have

1 = (x - 100) / 15

1 * 15 = x - 100

15 = x- 100

x = 15 + 100

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4 0
3 years ago
A 10-ounce box of cereal cost $3. A 20-ounce box of the same cereal cost $5. A third box of the same cereal costs $8.
kvasek [131]

The number of ounces of cereal in the third box is 32.

<u>Explanation:</u>

Given-

10 oy box = $3

Price of 1 ounce box = $3/10

                                  = $0.3

20 oy box = $5

Price of 1 oy box = $5/20

                            = $0.25

Therefore, it is beneficial to buy a 20 oy box as it is comparatively cheaper than the 10 oy box.

Third box of cereal = $8

$5 is the price of 20 oy box

$8 will be the price of x oy box

So,

x = \frac{20}{5} X 8\\ \\x = 32

Therefore, the number of ounces of cereal in the third box is 32.

3 0
3 years ago
Which of the following rules best describes the matrix below? (Picture)
alexdok [17]

Answer:

option b

reflection over the line y = x

Step-by-step explanation:

Matrix for every option is mention below

a)

rotation of 90° counter clockwise about the origin

0    -1

1     0

b)

rotation of 180° about the origin

-1    0

0    -1

c)

for a reflection in the line y=x

0    1

1     0

d)

translation 1 unit left and 1 unit up

1      0

0     1

3 0
3 years ago
Read 2 more answers
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