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givi [52]
3 years ago
7

una maestra de ciencias tiene 0.4 litors de agua de mar. ella le da a cada uno de sus 22 alumnos un recipiente y una cuchara de

5 mililitros luego, les pide a sus alumnos que inviertan dos cucharas de agua de mar en su recipiente ¿ cuantos millilitros de agua de mar quedaran despues de que 22 estudiantes hayan llenado sus recipientes
Mathematics
1 answer:
victus00 [196]3 years ago
5 0
There will be 180 mL of water left.

To convert liters to milliliters, multiply by 1000:
0.4(1000) = 400

Each student will use two 5-mL spoons of water; 2(5) = 10 mL each. 10(22) = 220 total mL

400-220 = 180 mL left
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Andy is solving a quadratic equation using completing the square. If a step in the process results in 169/9 = (x – 6)2, could th
natta225 [31]
Yes the equation can be solved by factoring. Using the given equation take the square root of both sides. Both 169 and 9 are perfect squares so the left side becomes plus or minus 13/3 which is rational. Six plus 13/3 is also a rational number. If the solutions of a quadratic equation are rational then the equation is factorable. Please mark a good rating and brainlest
8 0
3 years ago
Read 2 more answers
What is the interval notation for the compound inequality? x ≤ −4 or x ≥ 5
torisob [31]

Answer:

(-∞, -4] ∪ [5, ∞)

Step-by-step explanation:

Hi!

Alright, so greater (or less) than or equal to is denoted with a bracket.

If x is less than or equal to -4, then the bracket is on the left side.

(___, -4]

Because x is <em>any</em> number under or equal to -4, x can range from negative infinity. However, we use a parentheses for infinity because infinity can never truly be reached.

So, x \leq -4 = (-∞, -4]

X\geq5

Equal to = bracket

X is any number above 5, so

[5, ∞)

Because we want both of these, we use the union sign (∪)

so,

= (-∞, -4] ∪ [5, ∞)

8 0
3 years ago
The square of a number is 12 less than 7 times the number. What is the number?
hjlf

<u><em>Answer:</em></u>

The number is either 3 or 4


<u><em>Explanation:</em></u>

Assume that the number we are looking for is x

The square of the number would be x²

7 times the number would be 7x


<u>We are given that:</u>

square of the number (x²) is 12 less than 7 times the number (7x)


<u>Translating this into an equation, we would have:</u>

x² = 7x - 12


<u>Rearranging the quadratic equation:</u>

x² - 7x + 12 = 0


<u>Now, we factor the equation:</u>

(x-4)(x-3) = 0


<u>This means that:</u>

either x-4 = 0 ..................> x = 4

or x-3 = 0 ........................> x = 3


<u>Let's check if any of the solutions is an extrovert:</u>

For x = 3 .............> (3)² = 7(3) - 12 .........> 9 = 21 - 12 .......> 9 = 9 .......> not extrovert

For x = 4 .............> (4)² = 7(4) - 12 .........> 16 = 28 - 12 .....> 16 = 16 ....> not extrovert


Since we have no restrictions on the number, therefore, both solutions would be accepted


Hope this helps :)


7 0
3 years ago
Which relation is a function.
GREYUIT [131]

Answer:

its B

Step-by-step explanation:

I just did it

7 0
2 years ago
In a sample, which statement is TRUE about the age of the group surveyed? A) The age of the group surveyed should be lower than
AleksAgata [21]

Answer:

C

Step-by-step explanation:

8 0
3 years ago
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