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matrenka [14]
4 years ago
5

Expand and simplify2a + 3(a + 5) ​

Mathematics
1 answer:
Wewaii [24]4 years ago
6 0

Answer:

5a + 15

Step-by-step explanation:

2a + 3(a + 5)

open brackets

2a + 3a + 15

5a + 15

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The overall regression F-statistic tests the null hypothesis that:____.
AnnZ [28]

Answer:

A

Step-by-step explanation:

F test is a statistical method used to determine which models best fits the population from which the sample is derived. It is a ratio of two variances. Variance measure the rate of dispersion

The formula for calculating f-test = explained variance / unexplained variance

There are two hypothesis in an f test :

1. the  null hypothesis  - all slope coefficient are equal to zero

the alternative hypothesis : at least one of the slope coefficient is not equal to zero

8 0
3 years ago
3. Jen’s parents buy a tablet for her to use in school. Of the $1500 cost, her parents expect her to pay back $1000 one year lat
NNADVOKAT [17]

Answer:

<h3>33.3%</h3>

Step-by-step explanation:

Using the formula for calculating simple interest as shown;

Simple Interest = Principal * Rate *Time/100

Principal = Cost of tablet = $1500

Interest after one year  =  $1500-$1000 = $500

Time = 1year

Substituting this values into the formula;

500 = 1500*rate*1/100\\Cross\ multiplying\\50,000 = 1500 * rate\\Rate = 50,000/1500\\Rate = 33.3%

The interest rate that her parents assumed is 33.3%

4 0
3 years ago
I need help with a geometry question
Natali [406]
Lines a and b are parallel, and lines c and d are parallel
7 0
3 years ago
Tara has a large box of dog treats that weighs 6.0 pounds. She uses the large box of dog treats to make smaller bags, each conta
pogonyaev

Answer:

10 bags

Step-by-step explanation:

Calculation for How many smaller bags of dog treats can Tara make

First step is to multiply 6.0 pounds and 0.6 pound by 10 in order to make them a whole number

6.0*10=60

0.6*10=6

Now let calculate How many smaller bags of dog treats can Tara make

Smaller bags of dog treats =60/6

Smaller bags of dog treats=10

Therefore the numbers of smaller bags of dog treats that Tara can make is 10 bags

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3 years ago
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Answer: A 3 non collinear pts

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2 years ago
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