Answer:
12 km/h
Step-by-step explanation:
Given: Distance covered by boat downstream = 50 km
Distance covered by boat upstream = 30 km
Time taken by boat in down stream and upstream are equal.
Speed of the stream = 3 km/h
Let x be the speed of boat in still water.
∴ Speed of boat in downstream [tex](s_1)[/tex] = [tex](x+3)\ km/h[/tex]
Speed of boat in upstream [tex](s_2)[/tex] = [tex](x-3)\ km/h[/tex]
As we know, [tex]Time = \frac{Distance}{speed}[/tex]
And time remain same for both upstream and downstream
∴ [tex]\frac{50}{(x+3)} = \frac{30}{(x-3)}[/tex]
Now, cross multiply both side
⇒ [tex]50\times (x-3) = 30\times (x+3)[/tex]
⇒ [tex]50x-30x = 150+90[/tex]
∴ [tex]x= 12\ km/h[/tex]
∴ Speed of boat in still water is 12 km/h
There are 16 ounces in 1 pound.juan is mailing a packet that weigth 10 pound he want to know the weight of the package in once’s
Answer:
160 ounces
Step-by-step explanation:
1 pound=16 ounces
so,
10 pounds=16 multiplied by 10= 160 ounces
Fun fact u spelled ounces at the very last.
pls can I have five star
The weight of the 10-pound package is 160 ounces.
Explanation:There are 16 ounces in 1 pound. Juan is mailing a packet that weighs 10 pounds. To find the weight of the package in ounces, multiply the number of pounds (10) by the unit equivalence (16).
10 pounds x 16 ounces/pound = 160 ouncesTherefore, the weight of the package is 160 ounces.
Mia is 160.2 centimeters tall.Rosa is 165.1 centimeters tall.how much taller is Rosa the Mia?
Answer:
4.9
Step-by-step explanation:
165.1-160.2
A line passes through (10,5) and (13,-4). Write the equation in standard form
Answer:
Standard Form : 3x+1y=35
Step-by-step explanation:
The equation of the line will be 3x+y-35=0
What is the equation of the line written in standard form?The equation of the line in standard form will be expressed by using the coefficient of x and coeficient of y which is given
ax+by+c=0
How to determine the equation of the line in standard form from two point passing through it?The equation of line which passes through two points will be
(y-y₁)/(x-x₁)=(y₂-y₁)/(x₂-x₁)
So according to asked question,
x₁=10,y₁=5
x₂=13,y₂=-4
the equation of line will be
(y-5)/(x-10)=(-4-5)/(13-10)
⇒(y-5)/(x-10)=-9/3
⇒(y-5)/(x-10)=-3
⇒y-5=-3(x-10)
⇒y-5=-3x+30
⇒y+3x-5-30=0
⇒3x+y-35=0
Therefore the equation of the line will be 3x+y-35=0
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how many pencils measure 6 inches
Answer:
11
Step-by-step explanation:
because that are 11 pencils that are 6 inches or longer, that's what the picture says.
Answer:
Helpful piece of information - each x = 1 pencil
Step-by-step explanation:
If each x = 1 pencil, and their are 6 x's over the 6 inch mark, 2 x's over the 7 inch mark, and 3 x's over the 8 inch mark, how many pencils measure 6 inches or more?
11 pencils measure 6, 7, and 8 inches.
I hope this helps!
In 2015, nearly three out of every ten autos sold in a country was a crossover utility vehicle. If an auto dealership sold 4800 vehicles in total that year, how many of these sales would be expected to involve a cuv? Simplify your answer.
Answer:
about 160
Step-by-step explanation:
Answer:
1440 CUVs, approx. Actual number would be slightly lower.
Step-by-step explanation:
To answer this question, multiply 4800 vehicles by (3/10) for an approximation of the number of CUVs sold:
4800 3
---------- * ------- = 1440 CUVs
1 10
if x varies directly as y, find x when y=8. x=11 when y=-3
Answer:
[tex]x=-\frac{88}{3}[/tex]
Step-by-step explanation:
When a quantity "A" varies DIRECTLY with another quantity "B", we can write the proportionality equation as:
A = kB
Where k is the proportionality constant (to be found)
In this problem, it is given x varies DIRECTLY with y, so we can write:
x = ky
Also, given, x = 11, y = -3, so we plug these into the equation and first find k:
x = ky
11 = k(-3)
k = -11/3
Now, we need to find x when y = 8, so we substitute and find x:
[tex]x=ky\\x=(-\frac{11}{3})(8)\\x=-\frac{88}{3}[/tex]
To find x for a given value of y when x varies directly as y, determine the constant of proportionality using the provided pair of values. Then use this constant to calculate x for the new value of y.
Explanation:Since x varies directly as y, we can write this as x = ky, where k is the constant of proportionality. To find the value of k, we use the given values: x=11 when y=-3. Substituting these values into the equation gives us 11 = k(-3), or k = -11/3.
To find x when y=8, we substitute y=8 and the value of k into the direct variation equation: x = (-11/3)(8) = -88/3 = -29.33. Therefore, x is approximately -29.33 when y=8.
10. A nursery owner buys 5 panes of glass to
some damage to her greenhouse. The S Danes
cost $14.25. Unfortunately, she breaks 2 more
panes while repairing the damage What is the
cost of another 2 panes of glass?
In the spinner below the large wedges are twice the size of the smaller ones. What is true about the probability of landing on 6 and the probability of landing on 5?
Answer:
A
Step-by-step explanation:
If we take each small section to be "1" unit, we can say the large sections (for "2" and "5") are "2" units each. So in total there will be 8 sections.
Since 5 is "2" sections, we can say:
P(5) = 2/8 = 1/4
And 6 is "1" section, so we can say:
P(6) = 1/8
Definitely, Probability of landing a 6 is HALF that of probability of landing a 5. Also we can see this is the picture.
So, from the answer choices, A is right.
Chad made a snack by combining 1/3 of a bowl of granola with ¼ of a bowl of
chopped banana and ½ of a bowl of yogurt. Did one bowl hold all of the
ingredients at one time? Explain
Answer: No
Step-by-step explanation: because
1/2 +1/4 +1/3 is larger than one bowl.
6+3+4/12 = 13/12
;. 1 ¹/12.
Therefore, 1 bowl can not carry it
No, One bowl can not carry all of the ingredients at one time.
What is the unitary method?The unitary method is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value.
Chad made a snack by combining 1/3 of a bowl of granola with ¼ of a bowl of chopped banana and ½ of a bowl of yogurt.
The total amount 1/2 +1/4 +1/3 is larger than one bowl.
6 + 3 + 4/12 = 13/12
also 1 ¹/12.
Therefore, No 1 bowl can not carry it.
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9/16 = x/12
x-3/18 = 12/9
7/11 = 18/x+1
3x-4/14 = 9/10
Simplify
Answer:
Step-by-step explanation:
9/16=x/12
cross product
16x=9*12
16x=108
x=108/16
simplify
x=27/4
---------------
x-3/18=12/9
x=12/9+3/18
x=24/18+3/18
x=27/18
x=3/2
--------------------
7/11=18/x+1
18/x=7/11-1
18/x=7/11-11/11
18/x=-4/11
x=18/(-4/11)=(18/1)(-11/4)=-198/4=-99/2
x=-99/2
Willa is building birdhouses. Each side of the birdhouse will need 9 nails. How many nails does Willa need for each birdhouse? There are 7 sides on the birdhouse. If Willa uses only 7 nails on each side, how will the total number of nails she uses change?
The total number of nails will decrease by 14 nails when Willa will use 7 nails on each side.
Step-by-step explanation:
Sides of one birdhouse = 7
Nails used on each side = 9
Nails used on one birdhouse = Nails per side * Sides of birdhouse
Nails used on one birdhouse = 9*7 = 63 nails
If she uses 7 nails on each side, then the number of nails used on one birdhouse;
No. of nails = 7 * 7 = 49 nails
Change = Nails used on one birdhouse - No. of nails
Change = 63 - 49 = 14
The total number of nails will decrease by 14 nails when Willa will use 7 nails on each side.
Keywords: multiplication, subtraction
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Each birdhouse needs 63 nails. If Willa uses only 7 nails on each side, she will need a total of 49 nails.
Explanation:Each side of the birdhouse requires 9 nails, and there are 7 sides on the birdhouse. To find the total number of nails needed for each birdhouse, we can multiply the number of nails per side by the number of sides:
9 nails/side x 7 sides = 63 nails needed for each birdhouse.
If Willa only uses 7 nails on each side, the total number of nails she uses will change. The new total number of nails can be found by multiplying the new number of nails per side (7 nails) by the number of sides (7 sides):
7 nails/side x 7 sides = 49 nails in total.
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Please help on question c
Answer: 240 km
Step-by-step explanation:
From the graph :
50 miles = 80km
1 miles = 80/50 km
Therefore :
150 miles = 80/50 x 150
150 miles = 240 km
Which expression has a negative value? a)−1×−2 b)−1×2×−3×4×−5 C) 1×−2×−3×−4×−5 d)1×−2×3×−4×5
Answer:
b)−1×2×−3×4×−5 has a negative value.
Step-by-step explanation:
Given expressions are a)−1×−2 b)−1×2×−3×4×−5 C) 1×−2×−3×−4×−5 d)1×−2×3×−4×5
Firstly we have to multiply the digits with digit then after minus sign.
So for a)−1×−2
Solution, [tex]1\times2\ =2[/tex]
When two negative signs are multiplied with each other it gives a positive sign.
Both digits have a negative sign that means it gives a positive sign.
So the solution for 1st expression is [tex]2.[/tex]
b)−1×2×−3×4×−5
Solution,[tex]1\times2\times3\times4\times5\ =120[/tex]
Here three digits have negative sign, two negative gives positive and then multiplied by negative gives negative.
So the solution for 2nd expression is [tex]-120[/tex].
C) 1×−2×−3×−4×−5
Solution,[tex]1\times2\times3\times4\times5\ =120[/tex]
Here four digits have negative sign, two negative gives positive and again two negative gives positive means positive multiplied with positive gives positive.
So the solution for 3rd expression is [tex]120[/tex].
d)1×−2×3×−4×5
Solution,[tex]1\times2\times3\times4\times5\ =120[/tex]
Two digits have a negative sign that means it gives a positive sign.
So the solution for 4th expression is [tex]120[/tex].
Hence the correct option is b.
Answer:
B
Step-by-step explanation:
What's the awnser to x÷9=157
Answer:
x = 1413Step-by-step explanation:
[tex]x\div9=157\\\\\dfrac{x}{9}=157\qquad\text{multiply both sides by 9}\\\\9\!\!\!\!\diagup^1\cdot\dfrac{x}{9\!\!\!\!\diagup_1}=(9)(157)\\\\x=1413[/tex]
13 lb7 oz + 10 lb2 oz
Final answer:
The sum of the two weights, 13 lb 7 oz and 10 lb 2 oz, is 23 lb 9 oz. You add the ounces first, which don't need conversion, and then add the pounds.
Explanation:
Adding Pounds and Ounces
The question involves adding two weights together that are given in pounds and ounces. To do this, we need to add the ounces together first and then the pounds. The sum of 7 ounces and 2 ounces is 9 ounces. Since there are 16 ounces in one pound, we have no need to convert these ounces to pounds. The sum of 13 pounds and 10 pounds is 23 pounds. Therefore, when we combine these two sums, we arrive at the total weight of 23 pounds and 9 ounces.
What is the answer to the photo
Answer:
96 is the answer maybe of it
2.4x-9.1x+12.5=-39.44
Answer:
I think the simplified answer is 7.69
Estimate. Round to the greatest place value. Circle whether the estimate is greater then or less then the actual product.
Rounding to the greatest place value requires focusing on the digit to the right of the place value you're rounding to. If it's 5 or above, round up, if less, round down. This makes calculations easier by providing an estimated value close to the actual one.
Explanation:In this question, you are asked to estimate a value by rounding to the greatest place value. To do this, you will focus on the digit in the place value you are rounding to and the digit to its right. If the digit is 5 or more, you will round up. If it's less than 5, you will round down. It's called the estimation because it's not an exact value but a value close to the actual one best suited for calculations.
For example, if you have the number 4387 and you want to round it to the greatest place value, which is thousands place, you will look at the hundreds place value which is 8 (greater than 5), so you round up to 5000. Your estimated number, 5000, is greater than the actual product.
The purpose of rounding and estimation is to simplify calculations and analyze systems or data without being bogged down by specificities.
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solve these absolute value equations step by step
Answer:
16 is x<3
Step-by-step explanation:
4x-10<2
Add 10 to both sides
4x<12
Divide 4 from both sides and you get x<3
Write an equation in point slope form (-7, 4) m=-¾
Answer:
y=-3/4x-5/4
Step-by-step explanation:
use the formula y-y1=m(x-x1)
y-4=-3/4(x-(-7))
Granola costs $2.79 for 16.4 ounces. At this rate how much does 25 ounces of granola costs? Round to the nearest cent .
Answer:
$4.25
Step-by-step explanation:
Ratio:
2.79:16.4 = x:25
16.4 × x
2.79 × 25
Cross multiply: 16.4x = 69.75
Then divide: 69.75 ÷ 16.4 = $4.25
At 6:00 AM the temperature was 35 degrees Celsius. At 5:00 PM the temperature was 28 degrees Celsius. Was it warmer or cooler at 5:00 PM?
Answer:
I think it was warmer
87 1/2% of what number is 105?
Answer:
120
Step-by-step explanation:
87.5% of what number is 105?
87.5%=0.875
105/0.875=120
sarah dvd collection. is stored in a cabinet that holds 6 dvds on each self. jow many shelves will she need to hold her collection of 89 dvds?
Answer:
15 shelves
Step-by-step explanation:
6 dvds = 1 shelf
89/6= 14.8333333333 shelves
But you cannot have 0.8333333333 shelves so you would round 0.8333333333 to 1
Erica and Amy started biking in the opposite directions at the same time from the same place. Erica biked at a speed of 6 meters per second and Amy biked at a speed of 4 meters per second. How soon were they exactly 1 km apart?
Answer:
100 seconds
Erica and Amy are at distance of 1 km in 100 seconds
Step-by-step explanation:
They both are travelling in opposite directions so the sum of the distances they travel is the distance between them.
Let's take t as the total time taken to achieve a seperation of 1km
Distance traveled by Erica , (Speed of Erica - v1)
x1 = v1 * t
Distance travelled by Amy , (Speed of Amy - v2)
x2 = v2*t
Therefore sum of the distances they traveled is x1+x2 = x
x = v1*t + v2*t
x = t*(v1 + v2)
Here it is given that final seperation between Amy and Erica is 1km or 1000 m
Therefore x = 1000 m
Thus t = [tex]\frac{x}{v1+v2}[/tex]
Substituting given values v1 = 6 m/s v2 = 4 m/s
Therefore,
They are apart by exactly 1km in a time of 100 sec
2(x-1)-y=-8
y=2x+8
substitution method
Answer:
No Solution.
Step-by-step explanation:
2(x-1)-y=-8
y=2x+8
----------------
2x-2-(2x+8)=-8
2x-2-2x-8=-8
2x-2x-2-8=-8
0-2-8=-8
-2-8=-8
-10=-8
no solution
If cos theta = 3/5 and theta is in the first quadrant, what is sin 2 theta
Final answer:
To find sin 2θ when cos θ = 3/5, we first find sin θ using the Pythagorean identity and then apply the double angle formula, yielding sin 2θ = 24/25.
Explanation:
To find sin 2θ when given cos θ = 3/5 and θ is in the first quadrant, we can use the double angle formula for sine, which is sin 2θ = 2 sin θ cos θ. First, we need to find sin θ. Given that θ is in the first quadrant, all trigonometric functions are positive, and we can use the Pythagorean identity sin²θ + cos²θ = 1 to find sin θ. Since we know cos θ, cos²θ = (3/5)² = 9/25, which means sin²θ = 1 - 9/25 = 16/25. Taking the positive square root, since θ is in the first quadrant, sin θ = 4/5.
Now, we apply the double angle formula: sin 2θ = 2 × (4/5) × (3/5), which simplifies to sin 2θ = 24/25.
A radio telescope's shape can be approximated with the equation y=0.011x^2. Is the relationship between x and y linear? Is it proportional?
List the steps that should be used to solve the equation f(x) = g(x) by graphing when f(x) = (1/2)² - 3 and g(x) = 3x + 5?
* So far I got to f(x) = (1/2)² - 3x - 8 = 0 (what is the next step and does this problem require the use of logarithms?)
value of x is: [tex]x=\frac{-31}{12}[/tex]
Step-by-step explanation:
We need to solve the equation f(x)=g(x)
where [tex]f(x)=(\frac{1}{2})^2-3[/tex]
and [tex]g(x) = 3x + 5[/tex]
Solving to find f(x)=g(x)
Putting values of f(x) and g(x)
[tex]f(x)=g(x)\\(\frac{1}{2})^2-3=3x + 5\\\frac{1}{4}-3=3x + 5\\Subtarct\,\,5\,\,on\,\,both\,\,sides:\\\frac{1}{4}-3-5=3x + 5-5\\\frac{1}{4}-8=3x\\Taking\,\,LCm\,\,on\,\,left\,\,side\\\frac{1-8*4}{4}=3x\\\frac{-31}{4}=3x\\Divide\,\,both\,\,sides\,\,by\,\,3\\x=\frac{-31}{4*3}\\x=\frac{-31}{12}[/tex]
So, value of x is: [tex]x=\frac{-31}{12}[/tex]
The graph will be a straight line x= -2.58 or x = -31/12
Keywords: Composition of Functions
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What fraction of an hour is 8 minutes in simplest form
8 minutes is 2/15 of an hour when simplified, which is obtained by dividing both the numerator and denominator of the fraction 8/60 by the greatest common divisor of 8 and 60, which is 4.
To convert 8 minutes into a fraction of an hour, first understand that 1 hour is equivalent to 60 minutes. Therefore, to find what fraction 8 minutes is of an hour, you can create the ratio of 8 minutes to 60 minutes, which simplifies to:
8 minutes / 60 minutes = 8/60
This fraction can then be simplified by dividing both the numerator and the denominator by the greatest common divisor (GCD) of 8 and 60, which is 4, to obtain:
8/60 ÷ 4/4 = 2/15
Thus, 8 minutes is 2/15 of an hour in simplest form.