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horrorfan [7]
3 years ago
5

What’s the answer to this question ?

Mathematics
1 answer:
Usimov [2.4K]3 years ago
7 0

Answer:

(13,5)

Step-by-step explanation:

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Simplify: (7x^2 − 8x − 4) + (−2x^2 + 3x + 5) + (5x^2 − 10x − 8)
kramer
Step 1. Simplify
7x^2 - 8x - 4 - 2x^2 + 3x + 5 + 5x^2 - 10x - 8
Step 2. Collect like terms
(7x^2 - 2x^2 + 5x^2) + (-8x + 3x - 10x) + (-4 + 5 - 8)
Step 3. Simplify 

10x^2 - 15x - 7
5 0
3 years ago
For males in a certain town, the systolic blood pressure is normally distributed with a mean of 120 and a standard deviation of
KengaRu [80]

Answer:

G=93\ to\ 147

Step-by-step explanation:

From the question we are told that

Mean x= 120  

Standard deviation \sigma= 9

Percentage for men =99.75%

Generally the empirical rule 68%,95% and 99.7% of data value lay b/w 1,2,3 standard deviation of mean  

Standard deviation n= 9

Mean x= 120

Generally the interval  of systolic blood pressure for middle 99.7 of male G is mathematically given as

G=Mean \pm 3* \sigma

G=120 \pm 3*9

G=93\ to\ 147

6 0
3 years ago
At a high school, the length of a class period is 40 minutes. What is the length, in hours, of a class period at the high school
olga2289 [7]

Answer:

40 minutes

2/3 hours

0.667 hour

2,400 seconds

Step-by-step explanation:

5 0
3 years ago
Cuación. 3(x + 2) – 6 = 3x
zloy xaker [14]
Its a true equation. Every value of x would make it true. Every number is real (XER)
6 0
3 years ago
Colleen plans to start a small business by making and selling skirts. A sewing machine costs $250, and she estimates that she wi
Dmitrij [34]
Let C(x) be the function which calculates the total cost of making x skirts.

There is going to be a fixed constant, 250, to which we will add 15$ per x skirts.


So C(x)=250+15x

Answer: 250+15x
7 0
3 years ago
Read 2 more answers
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