Mathematics High School

Montana is known for having very chilly winters. One night, the temperature was falling by 2 degrees Fahrenheit each hour. At sunset, the temperature was -5 degrees Fahrenheit. How many hours will it take for the temperature to reach -19° F?​

Answers

Answer 1

Answer:

7 hours

Step-by-step explanation:

We are given that

At sunset, the temperature=-5 degrees Fahrenheit

Each hour, temperature falling=2degrees Fahrenheit

We have to find time taken to reach the temperature -19° F.

Let x be the time time taken to reach the temperature -19° F

According to question

[tex]-5+x(-2)=-19[/tex]

Where we taking 2 negative because temperature decreases.

[tex]-5-2x=-19[/tex]

[tex]-5+19=2x[/tex]

[tex]14=2x[/tex]

[tex]x=\frac{14}{2}[/tex]

[tex]x=7[/tex]

Hence, it will take 7 hours for the  temperature to reach -19° F.

Related Questions

What is the y value in this system of equations?
3x + 2y = 16
7x + y = 19

Answers

Answer:

y=5

Step-by-step explanation:

Answer:

3x + 2y = 16 y=−3/2x+8

7x + y = 19 y=−7x+19

Step-by-step explanation:

A triangle has a base of 4 inches and a height of 6 inches.
What is the area of the triangle?
O 10 in?
O 12 in
O 20 in
O 24 in?
PLS HELP RN!!!!!!

Answers

Answer:

12 in

Step-by-step explanation:

Please mark me the brainliest, 5 stars, and a thanks! have a great day!

10.The school needs to purchase a new refrigerator for student rewards. Lowes and Sears have the model
that the school would like to purchase. Lowes is having a 15% off sale and Sears is having a 10% off
sale with free delivery. If the original price at both stores is Lowes is $700, which is the better buy if
there is a $25 for delivery from Lowes?

Answers

Lowe’s would be a better. They would be $10 cheaper even after the delivery fee.

Evaluate the expression for j = 4.

20 − 2j =

Answers

The answer would be 12


Bc 2 times 4 equals 8 subtract that by 20 and it will have u 20
I think the answer would be 12

What is the diameter of this circle?​

Answers

Answer:

diameter=18 in

radius=9 in

area=254.47 in

circumference=56.55 in

Step-by-step explanation:

Key

C=Circumference

D=Diameter

R=Radius

A=Area

π=pi=3.14159265359

Formulas

2r=d

d/2=r

πr^2=a

(2πr)=c

Brainliest Plz

A library has 2000 books. There are 3 times as many non fiction books as fiction books. Write and solve an equation. PLEASE HELP ASAP!!!???

Answers

Answer:

x = fiction books

3x = nonfiction books

x + 3x = 2000

After you solve for x, (which is the number of fiction books), you can plug its value into the equation for nonfiction books (3x) and that will give you the number of non fiction books.

Step-by-step explanation:

Hope this helps! <3


Given parallelogram ABCD with
m B = 5x and mC = 3x+4.
Find the number of degrees in mD

Answers

Answer: X=22

Step-by-step explanation:

You have a jar filled with quarters and dimes. You choose 10 coins at random from the jar. Together, they are worth $2.05. How many of each type do you have?

Answers

Answer:

5 dime and 5 quaters

5x.10=.70

5 x .25=1.25

1.25 + .70= 2.05

(¡¡Please help!!)
Ronny can walk 4 miles in t minutes. At that rate, how long will it take her to walk 11 miles?
A. 11t/4
B. t + 7
C. 4t/11
D. t/11
E. 4/t

Answers

Answer:

Step-by-step explanation:

D is the answer

Answer:

C

Step-by-step explanation:

Question: The table shows pairs of random digits. The pairs in each group simulate the 5 shots taken by the opponent.
The paired digits 00 to 99 represent 100 shots.
Let 00 to 72 = a shot that is saved. Which digits represent a goal scored? Explain.

Answers

Answer:

90%

Step-by-step explanation:

The accompanying diagram shows two triangles. Which proportion could be used to solve for x ?

Answers

Answer:
A) 32/x=12/15

Explanation:
When we compare 32/x, we’re looking the ratio between the two side lengths on the first triangle. When we compare 12/15, we’re looking at the ratio between the two side lengths on the second triangle. These ratios must be equal to each other since the two triangles are similar, and we can use this to solve for x.

I hope this helps! Please comment if you have any questions.

Help please//brainliest!

Answers

Hi there!

The answer for this question is C, BD. As you can see, BC and DA are the same which means that AB and CD are also the same.

That only leads to BD which means that BD has the shortest sides.

please help mee!!! i will give u 5.0 starsss
Penny takes a taxi cab from the airport to her house. The distance is 4½ miles. The taxi costs $2.75 per mile. What is the cost of taking the taxi from the airport to her house? Round to the nearest cent.

Answers

Answer:

$12.38

Step-by-step explanation:

2.75 * 4.5 = 12.38

Answer:12.38

Step-by-step explanation:

Since the cost per mile is 2.75 even multiply that by the number of miles which would be 4.5 if you work that out it would get you 12.375 and you would round to 12.38 hope this helps.

helllpppppppppppppppp mmeeeeeeeeeee

Answers

Hugh the same time as the first time in the future and the other is a great way to get the best out of the way and

a- 6=9. Please help

Answers

Answer:

a = 15

Step-by-step explanation:

6 + 9 = 15

a = 15

15 - 6 = 9

yes

Answer:

a=15

Step-by-step explanation:

Move all terms not containing  a  to the right side of the equation.

15-6=9

What is 5x - 3y when x equals negative 2 and Y equals 6

Answers

Answer:

-28

Step-by-step explanation:

We have the equation [tex]5x-3y[/tex] and are given that [tex]x=-2, y=6[/tex].  To solve this equation, we simply replace the variables with their real value.  In action, this would be [tex]5(-2)-3(6)=-10-18=-28[/tex].

If a=-3, b=6, C=-5, what is the vertex?

Answers

Answer:

use the formula a(x-h)2+k

use the formula a(x-h)2+k

what is
g(x)= 7/8(7) - 1/2

Answers

Answer: g=3/56

Hope this helps you

Simplify the following expression.
1/2+ 1/10 = ?
А: 1/6
B:1/5
C.3/5
D:3/10
PLEASE ANSWER THIS QUESTION FAST

Answers

Answer: C: 3/5

Step-by-step explanation:

1/2 is equal to 5/10

so 5/10+1/10= 6/10

6/10 can simplify to 3/5

Simplify by combining like terms.
12+5t−4+15t+1

Answers

Answer:

9+20t

Step-by-step explanation:

Look at the terms and see which has t and which is a number when you see like terms, add them or subtract them together to get like terms.


Question in pic help plz


Answers

The answer would be C!!!!

no i wont help u (⌐■_■)

i need help my class is depending on me plzz help

Answers

Answer:

C

Step-by-step explanation:

Well, the area or a circle is pi r^2. The radius is 5. 5 squared is about 25. 25 times pi is roughly 78.5. So the best answer is C.

What is the area of the circle? *
4 yd
12.56 square yards
25.12 square yards
50.24 square yards
200.96 square yards

Answers

Answer:

The answer is 50.26548 which can be rounded to 50.24 therefore that being the answer.

HURRY WILL MARK YOU BRAINLIEST

Answers

Answer:

x=11/4

Step-by-step explanation:

4x+5=8x-6

4

x

=  8

x

−

1

1                <simplify

-8x -8x

-4x=-11                

x=11/4

11/4 there your welcome

A 747 Airplane is 762 inches tall. How tall is it in feet

Answers

Answer:

The answer is 63.5 feet :)

the airplane is 63.5 feet tall when converted from inches to feet

Solve for X

PLEASE HELP!!

Answers

u set ST and SR equal
7x + 24 = 115
7x = 91
x = 13

Help? 11 3/4 is the quotient of a number y and 6 1/4

Answers

Answer:

y divided by 6 1/4 = 11 3/4

Step-by-step explanation:

First, change the mixed numbers into improper fractions:

y divided by 25/4 = 47/4

Next, multiply both sides by 25/4:

y divided by 25/4 x 25/4 = 47/4 x 25/4

The 25/4's on the left side of the equation cancel each other out, leaving you with:

y = 47/4 x 25/4

Multiply 47 x 25 and keep the same denominator:

y = 1,175/4

Divide and:

y = 293 3/4

Fourteen percent of the town’s population is over the age of 65. If there are 320 residents over the age of 65, approximately what is the town’s population? *

Answers

Answer:

2286

Step-by-step explanation:

[tex]320 \div 1\% = 2286[/tex]

If 72 = 12x, what does x equal?

Answers

Answer:

x=6

Step-by-step explanation:

So, x is our unknown variable. An so you have to ask yourself, what times 12= 72? The answer would be 6, because 12x6=72

The proper way to do it, would be to divide 12/12 so you isolate the variable, and what you do to one side, you do to the other, so divide 72 by 12 and you get 6! Hope this helps!

Type the missing number in this sequence:
-5,
-30,
-180,

-6,480

Answers

-1,080, because they are all being multiplied by 6 :)
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