All categories

2 years ago

Question 6 of 25 Evaluate 4(x - 3) + 5x - x2 for x = 3. -

Mathematics

2 answers:

Zanzabum2 years ago

6 0

$\text{Given that,}\\\\4(x-3) +5x -x^2\\\\\text{For x =3,}\\\\4(3-3) +5(3) -3^2 = 4(0) +15 -9 = 6$

lapo4ka [179]2 years ago

4 0

4( 3 - 3 ) + 5 (3) -(3)2
distribute the 4 into the 3’s
multiply 5 by 3 as well as -3 and 2
add them all

You might be interested in

If m angle B=m angle D=34 , A what must m angle C be to prove quadrilateral ABCD is a parallelogram?

eimsori [14]

A is the answer
180-34= 146

7 0

3 years ago

Please help I've been getting this same problem wrong all day lol

worty [1.4K]

Answer:

$9\sqrt{2}$

Step-by-step explanation:

$=3\sqrt{2}+6\sqrt{2}$

$\mathrm{Add\:similar\:elements:}\:3\sqrt{2}+6\sqrt{2}=9\sqrt{2}$

7 0

2 years ago

Read 2 more answers

Seven students each picked 88 flowers. How many flowers did they pick altogether?

Dennis_Churaev [7]

Answer:

7(88)=616

Step-by-step explanation:

8 0

3 years ago

How many bottles can you drink?

jeka57 [31]

Step-by-step explanation:

You have 120 bottles of Cola and 120 bottles of Sprite.

You can exchange 3 empty Cola bottles for a new bottle of Sprite.

You can exchange 4 empty Sprite bottles for a new bottle of Cola.

You can borrow empty bottles, but must return them in the end.

What is the maximal number of bottles of drink that you can drink? Prove the optimality of your result.

As this is a puzzle, please give short and clever answers rather than tedious bruteforce calculations.

6 0

2 years ago

Of all sixth graders, 70% sent a text message yesterday. Ten trials of a simulation are conducted and the data are recorded belo

Effectus [21]

Answer:

80%

Step-by-step explanation:

According to the given data, the numbers 0 through 6 represent students who sent a text yesterday while the numbers 7 through 9 represent students who did not send a text yesterday.

Based on this key, we will calculate the number of students who sent the text yesterday and the number of students who did not sent the text yesterday.

The given data is: 62072, 34570, 80983, 04292, 83150, 36330, 96268, 14077, 77985, 13511

For each group we will identify how many students sent the text and how many students did not. According to the key, a number from 0 to 6 will be counted as a student who sent the text and a number from 7 to 9 will be counted as a student who did not send the text. Students who did not sent the text are made bold in the groups below.

62072: 4 students sent the text, 1 did not

34570: 4 students sent the text, 1 did not

80983: 2 students sent the text, 3 did not

04292: 4 students sent the text, 1 did not

83150: 4 students sent the text, 1 did not

36330: All 5 students sent the text

96268: 3 students sent the text, 2 did not

14077: 3 students sent the text, 2 did not

77985: 1 student sent the text, 4 did not

13511: All 5 students sent the text

We need to find the probability that 3 or more of a group of 5 students randomly selected will send a text today.

From the given groups, the number of groups where 3 or more students sent a text = 8

This represents our number of favorable or desired outcomes.

Total number of possible outcomes is the total number of groups = 10

Since, probability is defined as the ratio of number of favorable outcomes to total number of outcomes, based on the simulated data the probability that 3 or more of a group of 5 students randomly selected will send a text today will be = $\frac{8}{10}=0.80=80\%$

Thus, based on the simulated data there is 80% probability that 3 or more of a group of 5 students randomly selected will send a text today

5 0

3 years ago

Read 2 more answers