All categories

2 years ago

100 points for a multitude of questions

Mathematics

2 answers:

iris [78.8K]2 years ago

8 0

Answer:

x = 5

x = 3

x = 5

x = 2

Step-by-step explanation:

11 = 3(5) - 4

11 = 15 - 4

11 = 11

3/3 = 3 - 2

1 = 1

4 + 3(5) = 19

4 + 15 = 19

19 = 19

8(2) = -10(2) + 36

16 = -20 + 36

16 = 16

12 + 5(2) - 8 = 12(2) - 10

12 + 10 - 8 = 24 - 10

22 - 8 = 14

14 = 14

LUCKY_DIMON [66]2 years ago

4 0

1: 11-4= 7 .... 7/3 = x

2: Multiply by 3 .... x=3x-6 .... subtract the 3x.... x= -2

3: 19-4= 15 .... 15/3 .... 5=x

4: 8+10 .... 18x=36 .... 36/18 .... x= 2

5: 5x-8=12x-22 .... 5x=12x-14 ... -7x= -14 ... x=2

You might be interested in

2(q–8)< – 10 solve for q

natka813 [3]

Answer:

$= q < 3$

Step-by-step explanation:

$2(q - 8) < - 10 \\ 2q - 16 < - 10 \\ 2q < - 10 + 16 \\ 2q < 6 \\ \frac{2q}{2} < \frac{6}{2} \\ q < 3$

hope this helps

brainliest appreciated

good luck! have a nice day!

6 0

3 years ago

line s has a slope of -9/5. line t has a slope of 5/9. are line s and line t parallel or perpendicular

uysha [10]

Answer:

perpendicular

Step-by-step explanation:

If 2 lines are parallel then their slopes are equal

If 2 lines are perpendicular then the product of their slopes = - 1

Here

- $\frac{9}{5}$ × $\frac{5}{9}$ = - 1

Then the 2 lines are perpendicular

5 0

3 years ago

The overall regression F-statistic tests the null hypothesis that:____.

AnnZ [28]

Answer:

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

2 years ago

One week Beth bought 3 apples and 8 pears for $14.50. The next week she bought 6 apples and 4 pears and paid $14. Find the cost

zalisa [80]

Let us assume the cost of 1 apple = x dollars
Let us also assume the cost of 1 pear = y dollars
Then we can form two equations from the details given in the question. Based on those details the required answer to the question can be easily deduced.
3x + 8y = 14.50
And
6x + 4y = 14
Dividing both sides of the equation by 2 we get
3x + 2y = 7
2y = 7 - 3x
y = (7 - 3x)/2
Putting the value of y from the second equation in the first equation we get
3x + 8y = 14.50
3x + 8[(7 - 3x)/2] = 14.50
3x + 4 (7 - 3x) = 14.50
3x + 28 - 12x = 14.50
- 9x = 14.50 - 28
- 9x = - 13.5
9x = 13.5
x = 13.5/9
   = 1.5
Putting the value of x in the second equation we get
6x + 4y = 14
(6 * 1.5) + 4y = 14
9 + 4y = 14
4y = 14 - 9
4y = 5
y = 5/4
   = 1.25
So we can find from the above deduction that the cost of 1 apple is 1.5 dollars and the cost of 1 pear is 1.25 dollars
Then
Cost of 2 apples = 2 * 1.5 dollars
   = 3.0 dollars
So the cost of 2 apples is $3 and the cost of 1 pear is $1.25.

5 0

3 years ago

Ivan ate 40%, percent of the pizza. how many slices did he eat?

Olenka [21]

Around 3.2. 40%×8 slices is .4×8=3.2

6 0

3 years ago