can someone help me with this?
Answer:
8
Step-by-step explanation:
This problem uses the pythagorean theorem. 15 squared plus 8 squared equals 17 squared.
If 30.0 moles of oxygen are used, how many grams of water will form?
Answer:
3
Step-by-step explanation:
The amount of water released will be 1.081 grams.
How to calculate the amount of water released in a chemical reaction?The balanced chemical equation for the reaction between hydrogen gas and oxygen gas to form water is:
2H₂+ O₂ -> 2H₂O
According to the equation, 2 moles of hydrogen gas react with 1 mole of oxygen gas to form 2 moles of water. This means that the mole ratio of oxygen gas to water is 1:2.
If 30.0 moles of oxygen gas are used, we can use this mole ratio to calculate the number of moles of water that will form:
30.0 moles O₂ x (2 moles H2O / 1 mole O₂) = 60.0 moles H₂O
So, 60.0 moles of water will form.
To convert from moles to grams, we need to use the molar mass of water, which is approximately 18.015 g/mol. Therefore:
60.0 moles H₂O x 18.015 g/mol = 1,081 g
So, 1,081 grams of water will form.
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The record high temperature at the South Pole is 10°F. The record low temperature at the South Pole is
–
117°F.
How many degrees warmer is the record high temperature than the record low temperature?
Answer:
127 degrees f
Step-by-step explanation:
-117 + ? = 10
PLZ HELP I GIVE U BRAINLIEST
Answer:
4 wholes 3 out of 8
Step-by-step explanation:
...........
Step-by-step explanation:
convert mixed to improper fraction.
5/3×21/8
35/8
3. Would it be more efficient to use an inequality vo
or to list all of the quantities less than 6? Explain.
Answer:
Inequality
Step-by-step explanation:
There are an infinite number of quantities less than 6 (5, 4, 3, 2, 1, 0, -1, -2, -3...) so it is much easier to write an inequality
Salim built a rectangular prism with a length of 5 inches, a width of 4 inches, and a height of 3 inches. Would the prism Natalie built with a length of 3 inches, a width of 4 inches, and a height of 5 inches have the same volume or a different volume than Salim’s prism?
Answer:
same volume
Step-by-step explanation:
5X4X3=60, 3X4X5=60
How do you write this polynomial in standard form?
Answer:
You can also work on the ways that you write polynomials. One way to write a polynomial is in standard form. In order to write any polynomial in standard form, you look at the degree of each term. You then write each term in order of degree, from highest to lowest, left to right.
Step-by-step explanation:
Write the expression 3x−8+4x5 in standard form.
First, look at the degrees for each term in the expression.
3x has a degree of 1
8 has a degree of 0
4x5 has a degree of 5
Next, write this trinomial in order by degree, highest to lowest
4x5+3x−8
The answer is 4x5+3x−8.
The degree of a polynomial is the same as the degree of the highest term, so this expression is called a fifth degree trinomial.
Amelia's family took a road trip to Niagara Falls. Amelia fell asleep after they had travelled 931 miles. If the total length of the trip was 980 miles, what percentage of the total trip had they travelled when Amelia fell asleep?
Answer:
95%
Step-by-step explanation:
Total distance of trip = 980 miles
Miles covered when Amelia slept = 931 miles
what percentage of the total trip had they travelled when Amelia fell asleep?
Miles yet to be covered = 980 miles - 931 miles
= 49 miles
percentage of the total trip had they travelled when Amelia fell asleep = 931 / 980 × 100
= 0.95 * 100
= 95%
Answer:
95%
Step-by-step explanation:
Pleaseee helpp answer correctly !!!!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!!!!!!!
Answer:
720
Step-by-step explanation:
interior angles of a hexagon is 720
PLSSS I NEED HELP. I'll give you 20 points.
How many solutions does the system have. Explain how you know. For example do you solve it by substitution, elimination, f(x)=g(x). Is the answer going to be Infinite many solution, no solution, or one solution.
Answer:
ya, its no solution :)
Step-by-step explanation:
you subsitute the -1x + 3 in to the x + y=3 So the equation would be
x -1x + 3=3 and then you solve!
eiman bought 6 DVD all the same price that tax was 5.04 aed and the total was 85.74 what was the price of each DVD before tax?
What will be the cost of the paving if cement costs $26.50 per square metre?
Answer: $2203.74
Step-by-step explanation:
What is the arc measure, in degrees, of major arc \stackrel{\large{\frown}}{ADC} ADC ⌢ A, D, C, start superscript, \frown, end superscript on circle PPP below?
Answer:
[tex]\stackrel{\large{\frown}}{ADC} = 186^{\circ}[/tex]
Step-by-step explanation:
Given
See attachment
Required
Determine the measure of [tex]\stackrel{\large{\frown}}{ADC}[/tex]
[tex]The\ sum\ of\ angles\ in\ a\ circle\ is[/tex] [tex]360^{\circ}[/tex].
So, we have:
[tex]\stackrel{\large{\frown}}{ADC} + \stackrel{\large{\frown}}{APB} + \stackrel{\large{\frown}}{BPC} = 360^{\circ}[/tex]
Where:
[tex]\stackrel{\large{\frown}}{APB} = 70^{\circ}[/tex]
[tex]\stackrel{\large{\frown}}{BPC} = 104^{\circ}[/tex]
Substitute these values in the above equation.
[tex]\stackrel{\large{\frown}}{ADC} + 70^{\circ} +104^{\circ} = 360^{\circ}[/tex]
[tex]\stackrel{\large{\frown}}{ADC} + 174^{\circ} = 360^{\circ}[/tex]
Collect Like Terms:
[tex]\stackrel{\large{\frown}}{ADC} = 360^{\circ} - 174^{\circ}[/tex]
[tex]\stackrel{\large{\frown}}{ADC} = 186^{\circ}[/tex]
Answer:
186 is correct on khan academn=y
Sarah is watching a video online that is 246.987 seconds long. She writes this time in expanded form. Which expression represents the value of one of the digits in the length of the video?
Answer:
Sarah is watching a video online that is 4.7 minutes long.
Step-by-step explanation:
As we know 60 sec = 1 minute
⇒60×4 sec = 1×4 minutes
⇒240 sec = 4 minutes
⇒246.987 ≈ 247
= 240 + 7 seconds
= 4 minutes 7 seconds
= 4.7 minutes
∴ we get
Sarah is watching a video online that is 4.7 minutes long.
Select ALL of the following inequalities that could represent the situation:
4 more than x is at least 22
Answer:
Can anyone please answer my question please I need it please
Answer:
x + 4 [tex]\geq[/tex] 22
Step-by-step explanation:
maybe, i'm not sure
Can someone help me please
18 + a > 21 inequalities
Answer:
39
Step-by-step explanation:
Five-foot-tall Melody casts an 84-inch shadow. How tall is her friend if, at the same time of day, his shadow is 1 foot shorter than hers?
Answer:
The height of her friend is 4.826 feet.
Step-by-step explanation:
The length of the shadow ([tex]x_{S}[/tex]), measured in feet, is directly proportional to the height of the person ([tex]x_{P}[/tex]), measured in feet. That is:
[tex]x_{P} \propto x_{S}[/tex]
[tex]x_{P} = k\cdot x_{S}[/tex] (1)
Where [tex]k[/tex] is the proportionality constant, no unit.
We can eliminate this constant by constructing this relationship:
[tex]\frac{x_{P,M}}{x_{S,M}} = \frac{x_{P,F}}{x_{S,F}}[/tex] (2)
Where M and F represents Melody and Melody's friend. If we know that [tex]x_{P,M} = 5\,ft[/tex], [tex]x_{S,M} = 7\,ft[/tex] and [tex]x_{S,F} = 6\,ft[/tex], then the height of his friend is:
[tex]x_{P,F} = \left(\frac{x_{P,M}}{x_{S,M}} \right)\cdot x_{S,F}[/tex]
[tex]x_{P,F} = \left(\frac{5\,ft}{7\,ft}\right)\cdot (6\,ft)[/tex]
[tex]x_{P,F} = 4.286\,ft[/tex]
The height of her friend is 4.826 feet.
which rate is faster 2 feet per second or 2 seconds per foot, or are both rates the same
Answer:
2 feet per second is faster.
Step-by-step explanation:
2 seconds per foot would also equal half a foot per second, which is less than 2 feet per second.
Find the values of b such that the function has the given minimum value.
f(x) = x2 + bx − 21;
Minimum value:
−70
Answer: b = 14.
Step-by-step explanation:
We have the function:
f(x) = x^2 + b*x - 21
The minimum of a quadratic function will be at the vertex, and the vertex is at the value of x such that:
f'(x) = 2*x + b = 0
then the vertex is at:
x = -b/2
Then the minimum of the function f(x) will be:
f(-b/2) = (-b/2)^2 + b*(-b/2) - 21
and we know that the minimum value is -70, then:
f(-b/2) = -70 = (b^2)/4 - (b^2)/2 - 21
Now we need to solve this equation for b.
-70 = (b^2)/4 - (b^2)/2 - 21
-70 = -(b^2)/4 - 21
-70 + 21 = -(b^2)/4
49 = (b^2)/4
49*4 = b^2
196 = b^2
√196 = b = 14
The value of b is 14.
What is the domain of the given function? {(3, –2), (6, 1), (–1, 4), (5, 9), (–4, 0)}
a {y | y = –4, –2, –1, 0, 1, 3, 4, 5, 6, 9}
b {y | y = –2, 0, 1, 4, 9}
c {x | x = –4, –2, –1, 0, 1, 3, 4, 5, 6, 9}
d {x | x = –4, –1, 3, 5, 6}
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Assignme
x) 5.3.PS-7
Question Help
Together, teammates Pedro and Ricky got 2690 base hits last season. Pedro had 284 more hits than
Ricky. How many hits did each player have?
Pedro had base hits.
S
(1,1)
More
Answer:
can you explain more ........waht is this
Step-by-step explanation:
Solve 3(3×2) in a rectangular array
Answer: 18
Step-by-step explanation:
3(3)(2)
=(3)(6)
=18
HELP I AM CONFUSION WHATS THE ANSWERRR
How might snakes running out of food affect other organisms such as hawks? please help
Answer:
The population of Hawks and other species would likely start to edge off.
Step-by-step explanation:
Commonly, a Food Chain is dependent on all the parts of it sataying at a perfect point. If the food that the Snakes eat starts to run out, more of them will die off. With less Snakes, the Hawks will then have less food, and that continues throughout the chain. The same thing would happen if there was too much food, except instead of the populations of species dying off, the Snake population would spike.
The girls track team won 8 races and lost 2. Write the ratio of wins to total races in lowest terms
Answer: 4:1
Step-by-step explanation: it would start at 8:2 and the lowest terms it can go are 4:1
Answer:
5 : 4
Step-by-step explanation:
1. Find the total number of games
8 + 2 = 10
2. Create a ratio for number games vs. games won
10 : 8
3. Divide both numbers by 2
5 : 4
I don't know how to find the answer for (3 + 6b + 3b^2). I'm still confused even after my teacher explained it. Could someone break it down for me?
Answer:
steps below
Step-by-step explanation:
3 + 6b + 3b² = 3 (b² + 2b + 1) = 3 (b + 1)²
root: -1 if 3 + 6b + 3b² = 0 b = -1
The ratio of the measures of the angles of a triangle is 5:6:7 find the measures of the angles of the triangle.
Answer:50°
Step-by-step explanation:
Let x represent the scale factor, the ratios are multiplied by:
5x°+6x°+7x°=180°
18x°=180°
x=10
Smallest Angle 5x°=5(10)°=50°
3 squared=9 2(9)=18 18(5) 90
Answer:
Urhrndjdbgndidbgndotvsktvg
Determine the quadratic function given the graph
Answer:
x^2 - 2x - 3
Step-by-step explanation:
(x+1) (x-3)
x^2 - 3x + x - 3
x^2 - 2x - 3