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NikAS [45]
3 years ago
13

Find -30 + (-15) + 70.Select one: a. 55 b. 25 c. -55 d.-25​

Mathematics
1 answer:
Yuliya22 [10]3 years ago
7 0

Answer:

B

Step-by-step explanation:

Note that + ( - ) is equivalent to -

Given

- 30 + ( - 15) + 70

= - 30 - 15 + 70

= - 45 + 70

= 25 → B

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Starting with a 10 mL of sand and a graduated cylinder 5 mL of water is added to the sand. after waiting for the water to comple
Sedbober [7]

Answer:

Porosity of the sand is, 20 %.

Step-by-step explanation:

So according to the question,

10 mL of sand contains (5 - 3) mL = 2 mL of  water and this water fills the gaps or pores between the  sand partcles. So, porosity of the sand is given by,

   \frac {2 \times 100}{10} %

  = 20 %

8 0
4 years ago
What can you conclude from a box plot where the length of the left box and whisker is the same as the length of the right box an
Norma-Jean [14]

Answer/Step-by-step explanation:

The length of the boxes and whiskers of a box plot tells us more about the spread the data being represented is and as well as the shape of the spread.

Invariably, if the length of the left box and left whiskers is of the same length as the right box and right whiskers, this implies that the distribution of the data point is close to being symmetric, or approximately symmetrical.

4 0
3 years ago
Help plz and teach me how to answer
horrorfan [7]
Helen subtracted 17 from the right side of the equation when she should have added 17. Adding 17 to both sides would have gotten x/y by itself.

The answer is 'Helen should have added 17 to both sides of the equation'.
4 0
3 years ago
Read 2 more answers
In a softball league, the male to female ratio is 5:6. If there are 165 members in the league, how many females are in the leagu
Sonja [21]

Answer:

197.1

Step-by-step explanation:

5 0
3 years ago
Can someone please help me workout this problem? If the quotient obtained by dividing 8x^4 - 2x^2 + 6x - 7 by 2x+1 is equal to 4
Angelina_Jolie [31]

Answer:

The answer to your question is p = -2 q = -6  remainder = -10

Step-by-step explanation:

Data

Dividend = 8x⁴ - 2x² + 6x - 7

Divisor    = 2x + 1

Quotient = 4x³ + px² - qx + 3

Process

1.- Divide using long division

                                4x³ - 2x² + 3                          

                   2x + 1   8x⁴ + 0x³ - 2x² + 6x - 7

                             - 8x⁴ - 4x³

                                 0   - 4x³ - 2x²

                                      + 4x³ +2x²

                                          0       0   + 6x - 7

                                                          -6x - 3

                                                             0 - 10    Remainder

         px² = -2x²  then  p = -2

         -qx = 6x     then q = -6

5 0
3 years ago
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