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puteri [66]
3 years ago
7

Which expression is equivalent to -15x + 39?

Mathematics
2 answers:
Rainbow [258]3 years ago
8 0

Answer:

the second one

Step-by-step explanation:

because -3(5x + 13) you distribute and get

-15x -39

Lady_Fox [76]3 years ago
3 0
The second answer choice
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??? Anyone I need help
Schach [20]

Answer b

Because -2-5 adds -5 to it equals -7

If you have any questions about answer just ask

And please give brainliest

4 0
4 years ago
Let u = <-7, -2>. Find 4u.
Katena32 [7]

Answer:

a. <-28, -8>

Step-by-step explanation:

The given vector is

u = <-7, -2>.

To find 4u, we multiply the given vector by the scalar 4.

4u =4 <-7, -2>.

4u =<-7\times4, -2\times4>.

We multiply out to get;

4u =<-28, -8>.

The correct choice is a. <-28, -8>

8 0
3 years ago
Read 2 more answers
Tell whether the exact answer is reasonable 2.411. Mr. Jones sells gaones sells gardening supplies. A shovel sells for $19.He sa
dezoksy [38]
If he is selling shovels at $19 each, the answer of $153 would be incorrect. If you take $153 and divide that by 8 (shovels) you will get each shovel being a price of $19.125 each. 
The overall answer of $153 could be reasonable but the overall price from selling 8 shovels will actually be $154 not $153.
8 0
3 years ago
ANSWER ASAP TEST IN ONLY 45 MINUTES
melomori [17]

Answer:

-2x-15

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Tobi scored 145 on an iq test with a mean of 100 and a standard deviation of 15. what is her z score?
Andreas93 [3]

Z-score if Tobi scored 145 on an iq test with a mean of 100 and a standard deviation of 15 is 3.

According to the given question.

Tobi scored 145 marks on an iq test.

⇒ x = 145

Mean, μ = 100

Standard deviation, σ = 15

As we know that,

A Z-score is a numerical measurement that describes a value's relationship to the mean of a group of values.

And it is calculated by formula

Z = x -μ/σ

Where,

Z is a Z-score

μ is mean

x is the observed value

Therefore,

The Z-score if Tobi scored 145 on an iq test with a mean of 100 and a standard deviation of 15

= 145 - 100/15  

= 3

Hence,Z-score if Tobi scored 145 on an iq test with a mean of 100 and a standard deviation of 15 is 3.

Find out more information about Z-score here:

brainly.com/question/15016913

#SPJ4

7 0
2 years ago
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