Ask question

Ask question

All categories

3 years ago

7

Free pionts for brainlist pleas

2 answers:

meriva3 years ago

5 0

Sodium oxide is a simple strongly basic oxide. It is basic because it contains the oxide ion, O2-, which is a very strong base with a high tendency to combine with hydrogen ions. Reaction with water: Sodium oxide reacts exothermically with cold water to produce sodium hydroxide solution

oee [108]3 years ago

4 0

I don’t know anymore, ignore this ;-;

You might be interested in

LAST ATTEMPT! MARKING AS BRAINLIEST!! ( simplifying radicals)

serious [3.7K]

$\huge \bf༆ Answer ༄$

Let's solve ~

$\qquad \looparrowright \sf - 7 \sqrt{80 {x}^{4} y {}^{2} }$

$\qquad \looparrowright \sf - 7 \sqrt{2 {}^{4} \times 5 \times {x}^{4} \times {y}^{2} }$

$\qquad \looparrowright \sf - 7 \times {2}^{2} \times {x}^{2} \times y \times \sqrt{5}$

$\qquad \looparrowright \sf - 28 {x}^{2} y \sqrt{5}$

Therefore, Option D is correct ~

8 0

2 years ago

What is the solution of the following system of equations ? y- 2x and= 6 , y - 4x =0

Sveta_85 [38]

Answer:

x=3 and y=12

Step-by-step explanation:

$y-2x=6$ equation:1

$y-4x=0$ equation:2

Solving equation:1 for 'y' in terms of x

$y=6+2x$ equation:3

Putting 'y' in equation:2 which will make the equation of the single variable

$y-4x=0$

$6+2x-4x=0\\-2x=-6\\x=3$

Putting value of 'x' in equation:3 to find 'y'

$y=6+2x$

$y=6+2(3)\\y=6+6\\y=12$

6 0

4 years ago

If 4 − 7x is 5 less than 23, what is the value of 3x ?

adelina 88 [10]

4- 7x = 23- 5

4 - 7x = 18

-4 = -4

-7x = 14

/-7 = /-7

X = -2

3x = -6

8 0

3 years ago

2. Calculate the total cost, including 5.75% sales tax, of a $169.99

8_murik_8 [283]

Answer:

$179.76

Step-by-step explanation:

We can calculate the total cost as follows. The 1.00 represents the before-tax cost of the dehumidifier and the 0.0575 the 5.75% sales tax:

Total cost of dehumidifier = (1.00+0.0575)($169.99) = $179.76 (to the nearest

cent()

7 0

3 years ago

Samuel spends a total of $36.75 on 1 bag of popcorn and 3 drinks. Sebastian spends a totally of $138.00 on 3 bags of popcorn and

Ivanshal [37]

Answer: A popcorn costs $9

Step-by-step explanation:

Let popcorn be represented by p

Let drinks be represented by d.

Samuel spends a total of $36.75 on 1 bag of popcorn and 3 drinks. This will be: p + 3d = 36.75

Sebastian spends a totally of $138.00 on 3 bags of popcorn and 12 drinks. This will be: 3p + 12d= 138

p + 3d = 36.75 ........... i

3p + 12d = 138 ............ ii

Multiply equation i by 3

Multiply equation ii by 1

3p + 9d = 110.25 ....... iii

3p + 12d = 138 ............ iv

Subtract equation iv from iii

-3d = -27.75

3d = 27.75

Divide both side by 3

d = 9.25

A drink cost $9.25

From equation i

p + 3d = 36.75

P + 3(9.25) = 36.75

P + 27.75 = 36.75

P= 36.75 - 27.75

P= $9

A popcorn cost $9

6 0

3 years ago