All categories

3 years ago

Pls show work also!!

Mathematics

2 answers:

kotegsom [21]3 years ago

8 0

1. y + 6 = 20

subtract 6 from both sides

y = 14

2. x - 10 = 12

add 10 to both sides

x = 22

3. 12 + 2 = 15

false

4. 2 + n = 16

subtract 2 from both sides

n = 14

5. a + 4 = 14

subtract 4 from both sides

a = 10

6. m - 5 = 10

add 5 to both sides

m = 15

7. 4 + b = 30

subtract 4 from both sides

b = 26

8. 10 + c = 25

subtract 10 from both sides

c = 15

9. x - 60 = 20

add 60 to both sides

x = 80

10. 9 - 16 = 4

false

11. x - 15 = 20

add 15 to both sides

x = 35

12. w + 14 = 18

subtract 14 from both sides

w = 4

13. r - 18 = 27

add 18 to both sides

r = 45

14. 13 + k = 25

subtract 13 from both sides

k = 12

15. f - 16 = 34

add 16 to both sides

f = 50

I think you had some typos in there but I think this should get you started, you should be able to figure out the rest

wlad13 [49]3 years ago

7 0

Answer:

1)y=20-6=14

2)X=12+10=22

3)answer stated

4)n=14

5)10

6)15

7)26

8)15

9)80

10)stated

11)35

12)4

13)45

14)12

15)50

You might be interested in

Use the drop-down menus to choose steps in order to solve 5m - 8 = 3m + 8 for m.

frutty [35]

Answer:

m = 8

Step-by-step explanation:

5m - 8 = 3m + 8

-3m -3m

2m - 8 = 8

+ 8 + 8

2m = 16

/2 /2

m = 8

Hope this helps!

8 0

3 years ago

Read 2 more answers

Find the value(s) of k such that 4x² + kx + 4 = 0 has 1 rational solution

Blababa [14]

Answer:

If you mean only one rational solution, the answer is

$k_1 = 8, k_2 = -8$

If you mean at least 1 rational solution, the answer is

$k\in (-\infty, -8]\cup[8, \infty)$

Step-by-step explanation:

$4x^2 + kx + 4 = 0$

Let's calculate the discriminant.

$\Delta = b^2 - 4ac$

$\Delta = k^2 -4 \cdot 4 \cdot 4$

$\Delta = k^2 -64$

Now, remember that:

$\text{If } \Delta > 0 : \text{2 Real solutions}$

$\text{If } \Delta = 0 : \text{1 Real solution}$

$\text{If } \Delta < 0 : \text{No Real solution}$

Therefore, I will just consider the first two cases.

$k^2 - 64 > 0$

and

$k^2 -64 = 0$

$\boxed{\text{For } k^2 - 64 > 0}$

$k^2 > 64 \Longleftrightarrow k>\pm\sqrt{64} \Longleftrightarrow k\in (-\infty, -8)\cup(8, \infty)$

$\boxed{\text{For } k^2 - 64 = 0}$

$k^2 = 64 \Longleftrightarrow k=\pm\sqrt{64} \implies k_1 = 8, k_2 = -8$

7 0

3 years ago

PLS HELP ME

Tcecarenko [31]

Answer:

The mass of the larger hummingbird is 7 1/2 or 15/2.

Step-by-step explanation:

Bee hummingbird = 1 1/4g

Larger hummingbird = 6x that

So,

1 1/4 x 6 = 7.5

7.5 as fraction = 7 1/2 or 15/2

7 0

3 years ago

A large disaster cleaning company estimates that 30 percent of the jobs it bids on are finished within the bid time. Looking at

d1i1m1o1n [39]

Answer:

68.26% probability that the number of jobs finished on time is within 1 standard deviation of the mean.

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Looking at a random sample of 8 jobs that it has contracted, find the probability that x (number of jobs finished on time) is within one standard deviation of the mean.

Within 1 standard deviation of the mean is from Z = -1 to Z = 1. So this probability is the pvalue of Z = 1 subtracted by the pvalue of Z = -1.

Z = 1 has a pvalue of 0.8413

Z = -1 has a pvalue of 0.1587

So there is a 0.8413 - 0.1587 = 0.6826 = 68.26% probability that the number of jobs finished on time is within 1 standard deviation of the mean.

5 0

4 years ago

Given m || n, find the value of x and<br> y.

Ann [662]

Answer:

x = 41 , y = 139

Step-by-step explanation:

x and 41° are alternate exterior angles and are congruent , so

x = 41

x and y are a linear pair and sum to 180° , that is

x + y = 180

41 + y = 180 ( subtract 41 from both sides )

y = 139

3 0

2 years ago