Answer:
D
Step-by-step explanation:
Answer: the answer should be 90 :)
Hello! :)
Please help me solve this + explain your answer :)
I will indeed give you Brainlst <3
Answer:
D. (-2, 6)
Step-by-step explanation:
First, isolate a variable in one of the equations (i.e y = or x =)
The first equation already has isolated x.
x = y - 8 or y - 8 = x
5x + y = -4
Substitute the isolated variable into the second equation.
5(y-8) + y = -4
There is now only one variable, y, in the equation. Now you can solve for y.
First, use the distributive property to get the equation
5y - 40 + y = -4
Then, add 40 to both sides.
5y + y = 36
Add like-terms.
6y = 36
Divide.
36 / 6 = 6
So, y = 6.
Now that we have one coordinate, y = 6, you can substitute for y in the first equation.
x = 6 - 8
Subtract.
x = -2
Your coordinates are now x = -2 and y = 6, or (-2, 6).
Which point below would you use with the point (-2,-5) to get a line with a slope of -1?
A. (4,1)
B. (1.4)
C. (-6, 1)
D. (-1,-6)
Answer:
(D): (-1,-6)
Step-by-step explanation:
Given
[tex](x_1,y_1) = (-2,-5)[/tex]
[tex]m = -1[/tex]
Required
Find [tex](x_2,y_2)[/tex]
Slope (m) is calculated using:
[tex]m = \frac{y_2 -y_1}{x_2 - x_1}[/tex]
Substitute values for m, x1 and x2
[tex]-1 = \frac{y_2 -(-5)}{x_2 - (-2)}[/tex]
[tex]-1 = \frac{y_2 +5}{x_2 +2}[/tex]
Cross Multiply:
[tex]-1(x_2 +2) = y_2 +5[/tex]
[tex]-x_2 -2 = y_2 +5[/tex]
Make y the subject
[tex]y_2 = -x_2 - 2 - 5[/tex]
[tex]y_2 = -x_2 - 7[/tex]
Only (D): (-1,-6) satisfy this condition:
Substitute -1 for x2 and -6 for y2.
[tex]-6 = -(-1) - 7[/tex]
[tex]-6 = 1- 7[/tex]
[tex]-6 =- 6[/tex]
Hence:
(D): (-1,-6) is true
At 8:00 Aam the temperture is 53 at 11:00 Am it is 69
Answer:
what is the question?
Step-by-step explanation:
all u have is the numbers
This should be the format of your answer:
Ex. Given: distance = 500 m/s
time = 10 s
Asked: speed
Formula: d/t
Solution: 500 m/10 s
Answer: 50 m/s
2. The new Ferrari can accelerate from rest to 100 km/hr in 5 seconds. What is the average acceleration of the car in m/s2?
3. A car starts from a stoplight and is traveling with a velocity of 10 m/sec east in 20 seconds. What is the acceleration of the car?
4. A ball is rolled at a velocity of 12 m/s. After 36 seconds, it comes to a stop. What is the acceleration of the ball?
Answer:
The answer is below
Step-by-step explanation:
Acceleration is the time rate of change in velocity. Acceleration is given by:
Acceleration = change in velocity / time taken
Acceleration = (final velocity - initial velocity) / time
1) The Ferrari is from rest, hence initial velocity = 0. The final velocity = 100 km/h = [tex]\frac{100\ km*1000\ \frac{m}{km} }{1\ hr*\frac{3600\ s}{1\ hr} } =27.78\ m/s[/tex], time = 5 s
Acceleration = (0 - 27.78) / 5 = 5.56 m/s²
2) The car has initial velocity = 10 m/s. The final velocity = 10 m/s since velocity is constant. time = 20 s
Acceleration = (10 - 10) / 20 = 0 m/s²
3) The ball has initial velocity = 12 m/s. The final velocity = 0 m/s since it stops. time = 36 s
Acceleration = (0 - 12) / 36 = -0.33 m/s²
5
12
of the pupils in Year 9 say their favourite colour is red.
There are 180 pupils in Year 9.
How many students said red is their favourite colour?
What % of 25 is 15. Please help me
Answer:
15 is 60% (percent) of 25.
Step-by-step explanation:
Hey what is 1x2+4 +5
Answer:
11....................
Answer:
11
Step-by-step explanation:
-2+(-7)= What is the answer? HELP!!!!!!!!!
Answer:
-9
Step-by-step explanation:
- 2 + ( - 7 )
- 2 - 7 = -9 ( Answer)
I GIVVVVEEE BRAINLILST I NEED HELPP
Answer:
The answer is J,
it can't be H because that would increase the size by 10, when the problem describes a reduction. and it cant be F or G because it has the x and y values in the wrong spots.
Step-by-step explanation:
I hope this helped :)
Solve this pls. Thank you
Answer:
which one????????????????????
d.
T:
125 hrs
C. Lisa walks at an average speed of
6 km/h for 1 hours.
Dan completes the same distance in
of an hour.
Calculate Dan's average speed.
Question:
Lisa walks at an average speed of 6 km/h for 15 hours.
Dan completes the same distance in an hour. Calculate Dan's average speed.
Answer:
[tex]Speed = 90km/hr[/tex]
Step-by-step explanation:
Given
Lisa:
[tex]Speed = 6km/hr[/tex]
[tex]Time = 15\ hr[/tex]
First, we calculate the distance covered by Lisa:
[tex]Distance = Speed * Time[/tex]
[tex]Distance = 6km/hr * 15\ hr[/tex]
[tex]Distance = 90km[/tex]
So, Dan distance can be represented as:
[tex]Distance = 90km[/tex] --- Dan completes the same distance as Lisa
[tex]Time = 1\ hr[/tex] -- Time to complete the distance
Dan's average speed is:
[tex]Speed = \frac{Distance}{Time}[/tex]
[tex]Speed = \frac{90km}{1\ hr}[/tex]
[tex]Speed = 90km/hr[/tex]
Hence, Dan's average speed is 90km/hr
-18=-5x-(-2) what is x?
Answer:
x = 4
Step-by-step explanation:
-18 = -5x-(-2)
i) when there is a '-' sign in front of an expression in parentheses, change the sign of each term in the expression-18 = -5x+2
ii) move -5x to the left-hand side and change its sign5x-18 = 2
iii) move -18 to the right-hand side and change its sign5x = 2+18
iv) add the numbers5x = 20
v) divide both sides of the equation by 5[tex] \frac{5x}{5} = \frac{20}{5} [/tex]
[tex]x = 4[/tex]
plz hellp me plzzzzzzzzzz
Answer:
3n+6
Step-by-step explanation:
can u pls help me with this question
Answer:
c
Step-by-step explanation:
divide 1/5,280 and then multiply that by 6,600
Answer:
the answer is c
Step-by-step explanation:
multiply 6,600 by 1 and that will give you 6,600 again
after that you divide 6,600 and 5,280 that will get you 1.25
if you think I'm wrong just do it on the calculator it will give you 1.25
have a nice day!!
Please help!
What the values of the expression?
A. 3
B. 12
C. 27
D.81
Answer:
D. 81
Step-by-step explanation:
I am in the same class as you, I took the quiz and the answer was 81
Determine the input value for which the statement
f(x) = g(x) is true.
From the graph, the input value is approximately .
f(x) = 3 and g(x) = x – 2
3 = x – 2
5 = x
The x-value at which the two functions’ values are equal is .
Answer:
The x-value at which the two functions' values are equal is 5.
Step-by-step explanation:
Let [tex]f(x) = 3[/tex] and [tex]g(x) = x-2[/tex], if [tex]f(x) = g(x)[/tex], then:
[tex]x - 2 = 3[/tex]
[tex]x = 3+2[/tex]
[tex]x = 5[/tex]
The x-value at which the two functions' values are equal is 5.
6. Andrea deposits $350 dollars in her
checking account on Tuesday. On
Wednesday she withdraws $100. On
Thursday she deposits $75. Which of the
following shows the change in Andrea's
account from Tuesday to Thursday?
Help
2. (3.7) and (2.3) 7
I WILL MARK BRAINLIEst pls HELP MEEE
Answer:
associative, commutative, no, multipolication by 1 (don know what that is called), commutative, no, adding by 0, no
Step-by-step explanation:
3 and 6 are no because subtraction is not associative
and 8, well 0+12 is not 0
Write an algebraic expression for the phrase 6 times Z
Answer:
6z
Step-by-step explanation:
Question 1 A rectangular soccer field is 72 meters wide and 105.25 meters long. What is it's AREA? a) What operation (add, subtract, multiply or divide) would you use to solve this? b) How did you know?
Answer:
1. 7578
2. Multiply
3. Because area is equal to length time width.
Step-by-step explanation:
hope this helps
What is 5 -90 as a decimal
Answer:
-0.85
Step-by-step explanation:
First you subtract 5-90
the answer is -85
then convert -85 to a decimal
the answer is -0.85
PLEASE HELP WILL MARK BRAINLEIST
Answer:
I belive it's Y = 3/2x - 1
A circular light fixture has a radius of 20 centimeters.what is the circumference of the light fixture
Answer:
[tex]\boxed {\boxed {\sf 40 \pi \ cm, 125.6 \ cm, or \ 125.6637061 \ cm}}[/tex]
Step-by-step explanation:
Circumference can be found by multiplying the diameter of the circle by pi.
[tex]c= \pi d[/tex]
We are given the radius, which is 20 centimeters. We need the diameter, which is twice the radius.
[tex]d= 2r[/tex]
[tex]d= 2(20 \ cm)[/tex]
[tex]d= 40 \ cm[/tex]
Substitute the diameter into the formula. There are many ways to calculate circumference, so I included a few options.
1. In Terms of Pi
If we solve in terms of pi, we leave π in the answer.
[tex]c=\pi ( 40 \ cm)[/tex]
[tex]c= 40 \pi \ cm[/tex]
2. Using 3.14 as Pi
[tex]c=\pi ( 40 \ cm)[/tex]
Substitute 3.14 in for pi.
[tex]c= (3.14)(40 \ cm)[/tex]
[tex]c=125.6 \ cm[/tex]
3. Using 3.14159 as PI
[tex]c=\pi ( 40 \ cm)[/tex]
Use the pi button on a calculator.
[tex]c= 125.6637061 \ cm[/tex]
The circumference of the light fixture is 40π, 125.6 cm, or 125.6637061 cm
Ryan had some candy to give to his five children. He first took eight pieces for
himself and then evenly divided the rest among his children. Each child received four pieces. With how many pieces did he
start?
Answer:
28 pieces
Step-by-step explanation:
5 kids x 4 pieces = 20 pieces
20 + dad's 8 pieces = 28 pieces of candy
There is 7/8 of the pretzel bag left. If one serving is 1/4 of the bag. How many servings are left? Use the model to answer the question.
Answer:
5/8
Step-by-step explanation:
14.976 divided by 6 with remainder
Answer:
0
Step-by-step explanation:
it's divided evenly with no remainder
PLEASE HELP !!!!! WILL GIVE POINTS !!!!! (√a)=k√a where k=a^n. Find the value of n.
Answer:
im here for the points
Step-by-step explanation:
im here for the points
least to greatest 7.3,7 3/4,7.23,-7 2/3
A circle is cut in half and removed. What is the approximate area (shaded region) of the remaining portion of the circle in square feet? There is a picture of a circle with a line through the middle showing 12 feet.
12 feet ( A=pie(3.14)r^2)
Options are: A. 60 ft2 B. 120 ft2 C. 225 ft2 D. 450 ft2
Answer:
Step-by-step explanation:
area of a whole circle is pi [tex]r^{2}[/tex]
diameter is 2*r
1/2 * pi * [tex]6^{2}[/tex] will find the area of 1/2 of the circle that has a diameter of 12'
56.54866 '
so approx 60 ft
Jake says that there should be a decimal point in the quotient 142.45 ÷ 7.4 = 1,925 after the 2.
Part A
Which equation shows the best estimate for the quotient?
A. 150 ÷ 10 = 15
B. 150 ÷ 5 = 30
C. 140 ÷ 10 = 14
D. 140 ÷ 7 = 20
Part B
Use the drop-down menus to explain whether Jake is correct.
Jake
Choose...
correct because 192.5
Choose...
close to the estimate. The decimal point belongs after the
Choose...
.
Answer:
ok
Step-by-step explanation: