Answer:
-b/a
Step-by-step explanation:
The slopes of perpendicular lines are negative reciprocals. That means that their product is -1.
slope of line = a/b
slope of perpendicular = -b/a
Please help! I'll give brainliest! I'm gonna be grounded for the 3rd time this week if my stuff isn't done :/
How do geologists believe that the Devils Tower was formed?
A. All the land except the rocks around the Devils Tower were
eroded during the Ice Age.
B. The Devils Tower was an ancient hotspot that plate movements
isolated after the volcano became inactive.
C. Magma pushed up from the mantle to sedimentary rocks which
then eroded leaving the column.
D. It's the stem of a volcano that erupted millions of years ago
and surrounding rock eroded away.
Answer:
C. Magma pushed up from the mantle to sedimentary rocks which
then eroded leaving the column.
Step-by-step explanation:
Geologists Carpenter and Russell studied Devils Tower in the late 1800s and concluded that the Tower was formed by an igneous intrusion (the forcible entry of magma through other rock layers).
A right circular cylinder is changing shape. The radius is decreasing at the rate of 2 inches/sec while it's height is increasing at the rate of 5 inches/sec. When the radius is 4 inches and the height is 6 inches, how fast is the volume changing? Round your answer to three decimal places
The volume of the right circular cylinder is changing at a rate of approximately 50.265 cubic inches per second.
Given that a right circular cylinder is changing shape.
The radius is decreasing at the rate of 2 inches/sec
dr/dt = -2 inches
The radius is increasing at the rate of 2 inches/sec
dh/dt=5 inches
We have to find dv/dt when r is 4 inches and h is 6 inches.
Volume=πr²h
Differentiate with respect to 't' to find the change of volume:
[tex]\frac{dV}{dt}=\pi(2rh\frac{dr}{dt}+r^2\frac{dh}{dt})[/tex]
Plug in the values:
[tex]\frac{dV}{dt}=3.14(2(4)(-2)(6) + 16(5))[/tex]
[tex]=3.14(-96+80)[/tex]
[tex]=3.14(-16)[/tex]
[tex]=-50.265[/tex] inch³/sec.
Hence, the volume change is -50.265 inch³/sec.
To learn more on Three dimensional figure click:
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The middle school population is made up of 55% girls and 45% boys. Of the boys 40% have siblings what percent of the middle school population has siblings
Answer:2.5%
Step-by-step explanation:
2.5% of the school has sibloings
55+45=100
100÷40=2.5
PLS HELP DUE AT 5:00 pm
please help!! ill mark brainliest if correct as a christmas present but please help! :))
Answer:
(0.5 -2.5)
Step-by-step explanation:
B is at (1, -5). A dilation by 0.5 means that these coordinates are multiplied by 0.5 each.
So 0.5(1) then 0.5(-5) = (0.5, -2.5)
Please help me! First correct answer gets brainliest. Thanks!
PLZ HELP QUICKLY THANK YOU
The interval for this number line is_____.
A.3
B.5
C.4
D.6
Answer:
A: 3
FLVS... its right trust
Without dividing, determine the sign of the quotient:
(-0.00052) ÷ (-50000.00106)
a
The result is positive because a negative number divided by a negative number is positive.
b
The result is negative because the second number is negative.
c
The result is negative because at least one of the numbers is negative.
d
The result is negative because a negative number divided by a negative number is negative.
help fast
Answer:
Option A
Step-by-step explanation:
If you divide a negative number by a negative number, the answer will always be positive, so A must be the right answer
You prepare 10 scoops of dog food for 5 dogs, and prepare 16 scoops of dog food for 8 dogs. What
is the constant of proportionality for the amount of dog food to the number of dogs? How many
scoops of dog food should you prepare for 6 dogs?
Answer:
12 scoops of dog food are needed for 6 dogs,
Step-by-step explanation:
Proportions
The number of scoops of dog foods and the number of dogs are proportional variables.
We are given that 10 scoops of dog foods are used for 5 dogs. This gives a proportion of 10/5=2 scoops per dog.
We also know that 16 scoops are used for 8 dogs. The proportion is also 16/8=2 scoops per dog.
Thus, the constant of proportionality is 2.
For 6 dogs, you need to prepare 2*6 = 12 scoops of dog food.
12 scoops of dog food are needed for 6 dogs,
A bakery sells mocha cupcakes and chocolate cupcakes. One day it sold 28 mocha and
52 chocolate. What percent of the cupcakes sold that day were mocha?
Answer:
35% of the cupcakes were Mocha.
Step-by-step explanation:
So, 28 + 52 = 80 which means the question is: 28 is what percent % of 80? And 28 is 35% of 80. Hope I helped! Sorry if not. Have a wonderful day and an even better Christmas break! Remwmber to focus on the positive and give me a follow! ;) Bye!
HELPPP!!!???PLEASE HELPPP!!
Answer:
[tex]\frac{5}{14}[/tex] [tex]or[/tex] [tex]0.357142857143[/tex]
Step-by-step explanation:
__________________________________________________________
[tex]\frac{2}{7}\div\frac{4}{5}[/tex] = [tex]\frac{5}{14}[/tex] [tex]because[/tex],
[tex]\frac{2}{7}[/tex] = [tex]0.285714285714[/tex]
[tex]\frac{4}{5}[/tex] = [tex]0.8[/tex]
[tex]0.285714285714[/tex] [tex]\div[/tex] [tex]0.8[/tex] = [tex]0.357142857143[/tex]
[tex]\frac{5}{14}[/tex] = [tex]0.357142857143[/tex]
__________________________________________________________
Hope this helps! <3
__________________________________________________________
Answer:
it is A
Step-by-step explanation:
Multiply them then divide them by 2
A small business spend $23,000 for taxable items last year. The tax rate was 9.5%. How much did the small business pay in taxes last year?
Answer:
$2,185
Step-by-step explanation:
Multiply the amount spent by the tax rate.
23,000 x 9.5% = $2,185
what's the slope between (5,-2) and (-7,22)
Answer: The answer is: -2
Step-by-step explanation:
Here, suppose
(5,-2)=(x1, y1)
(-7,22)=(x2, y2)
Now, use the slope equation to find slope(m).
y2-y1=m(x2-x1)
or,m=y2-y1/x2-x1
After this, just substitute the values from above.
Find the coordinates of quadrilateral "WXY' after a dilation with the scale factor of 2.
Original coordinates:
V(6, 2), W2,4), X-3, -2), Y(3, -5), scale factor of 2
8
W
0 -86
10
12
NEED HELP ASAP
Answer:
2,1
Step-by-step explanation:
Answer: no
Step-by-step explanation:
What is the slope of the line defined by the equation y = 3x + 5?
Answer:
Step-by-step explanation:
slope(m)= -Coefficient of x / Coefficient of y
= -3/-1
= 3
Hence the slope of line in 3.
You are an office manager. You have been asked to research the cost of an online messaging service. The service charges $3.25 per employee each month. However, if you sign up for a full one-year subscription, the charge drops to $2.80 per employee per month. Your office has 20 employees.
Answer:
The final cost for the service that offers the better deal is $56 per month, in total for the whole year it's $672.
The cost for the one that offers the worse deal is $65 per month.
Step-by-step explanation:
All we need to do is multiply the amount of money by the number of employees.
So:
20 × $2.80 = $56
(Calculations for worse deal)
20 × $3.25 = $65
Answer: $108.00
Step-by-step explanation:
$3.25 per employee, per month (3.25 x 20 x 12) = $780/ mo
$2.80 per employee, per month (2.80 x 20 x 12) = $672/mo
subtract the two, which equals $108.00 will be saved each year with the one-year subscription.
At a store, a hat has a regular price of x dollars. During a sale, the price of the hat is discounted by 20%. The expression 0.8x describes the discounted price, in dollars, of the hat. Which expression also describes the discounted price, in dollars, of the hat?
Answer: D) x - 0.2x
Step-by-step explanation:
The hat has a regular price of x dollars.
This price is reduced by 20% so the relevant expression for the discount is; 20% * x or; 0.2x
The discounted price will be the price of the hat less the discount which means the formula will be;
= Price - discount
= x - 0.2x
Order 67% , 3/4 , 0.7, and 3/5 in order from least to greatest
Answer:
3/5, 67%, 0.7, 3/4
Step-by-step explanation:
3/4= 75%
3/5= 60%
67%
0.7= is equivelent to 70%
Ann drove 638 miles in 11 hours.
At the same rate, how many miles would she drive in 9 hours?
Answer:
638 miles / 11 hours = 58mph
So if he is traveling at 58 miles per hour for 7 hours, multiply the two numbers. 7(58) = 406
At the same rate of speed, Eric would travel 406 miles in 7 hours.
Step-by-step explanation:
I hope you undertand it
Answer:
522
Step-by-step explanation:
638 miles.......11hours
x miles ............ 9 hours
x = 638 * 9 / 11 = 522 miles
11. A survey of students showed that of them will try the new cafeteria foods. If 180 students are given a new cafeteria food, how many of them will try it? Record your answer and fill in the bubbles on your answer document. Be sure to use the correct place value.
Answer:
Im kinda confused on this too
Step-by-step explanation:
which expression is equivalent to 15 - 5x? select all that apply
A -5(x - 3)
B 3(5-x)
C -5(3- x)
D -(-5+2x) + x
Forces affect motions in living and nonliving things. In a human, swallowed food moves down the esophagus into the stomach, even if the human is upside down doing a handstand. Which force moves food through the esophagus into the stomach?
a:Frictional force in the esophagus moves food through the esophagus.
b:Gravitational force pulls food through the esophagus.
c:Magnetic force in the stomach pulls food through the esophagus into the stomach.
d:Push force from contractions of the esophagus moves food through the esophagus.
Answer:
a
Step-by-step explanation:
The force that moves food through the esophagus into the stomach is;
d:Push force from contractions of the esophagus moves food through the esophagus.
When we are sitting upright and eat food, the food moves down the esophagus and into the stomach.
Now, that will be a logical explanation because just like a flow, it goes with gravity position and would go from up down like a free fall.
However, when we are not sitting upright but upside down with our head on the ground and legs up, what happens is that the food still goes to the stomach via the oesophagus but this time because of the position of the body, the oesophagus will contract i.e. contraction in the walls of the food pipe which will lead to a push force that takes the food into the stomach.
Read more about digestive process at; https://brainly.com/question/1285073
Out of 30 students in Mohammed's class, 40% are girls. How many are boys?
Answer:
18 boys
Step-by-step explanation:
30*0.4= 12
30-12=18
Helpppppppppppppppppppppppp
Answer:
t0qjg9gkrgrgfr
Step-by-step explanation:
rgrgrgrgrgrgrgrgrg
Answer:
I believe the answer is a 25
Step-by-step explanation:
i learned this last year on I ready and I believe you divide each side in a half and thats the answer so it should be a
Can someone please explain this to me? I don't get it
PLEASE HELP simplify the following expression 4+√-4+√-9+7
Answer:
your answer simplified is:
13+3i
can yall do the work of the answer 95 to this
9514 1404 393
Answer:
? = 95°
Step-by-step explanation:
Long arc QR is twice the measure of inscribed angle QSR, so is 2×95° = 190°. That, together with the remaining short arcs ? and RS will make up the total circle of 360°.
arc QR + arc RS + ? = 360°
190° +75° +? = 360°
? = 360° -265° . . . . . . subtract 265° from both sides
? = 95°
A map has the scale 0.75 of an inch equals 220 miles. The distance from Springfield to Glenview is 6 inches. How many actual miles separate Springfield from Glenview?
Answer:
1,760 actual miles separate Springfield from Glenview.
Step-by-step explanation:
Scaling
Objects can be represented in a reduced or augmented size by using scaling which is basically multiplying or dividing real dimensions by a constant factor. We use scaling when representing geographic locations on a map.
The map has the scale:
0.75 inch => 220 miles
This gives us the scaling factor as 220/0.75. There is no need to divide.
We are given the distance from Springfield to Glenview is 6 inches on the map. The actual distance is
6*220/0.75 = 1,760
1,760 actual miles separate Springfield from Glenview.
The compound interest on Rs. 50000 at 4% per annum for 2 years compound annually is
Answer:
$54080
Step-by-step explanation:
Step one:
given
principal= Rs. 50000
rate= 4%= 0.04
time= 2 years
Required
The final Amount A
Step two
Applying
A= P(1+r)^t
substitute
A= 50000(1+0.04)^t
A= 50000(1.04)^2
A= 50000*1.0816
A= 54080
$54080
HELP PLEASE ITS Which point would not be a solution to the system of linear inequalities shown below? y -3x+7!
(5,−5)(10,−8)(5,−6)(−10,−7)
Answer:
(-10,-7)
Step-by-step explanation:
Lets start with the equation y>-3x+7
Which of these are solutions?
(5,-5) - yes
(10,-8) - yes
(5,-6) - yes
(-10,-7) - no
Now lets do the equation y<4/5x-2
Which of these are solutions?
(5,-5) - yes
(10,-8) - yes
(5,-6) - yes
(-10,-7) - no
So, the point (-10,-7) is not a solution to the system of equations.