Answer:Steven used 9 $0.02 stamps and 6 $0.10 stamps
Step-by-step explanation:
let number of $0.02 stamp be =x
let number of $0.10 stamp be =y
so that the number of stamps used can be expressed as
x+y=15
and the total price of stamps used equaling $0.78 be expressed as
0.02x + 0.10y =0.78
Solving
x+y=15----1
0.02x + 0.10y =0.78---2
from equation 1 , x =15-y, putting the value of x into equation 2
0.02(15-y) + 0.10y =0.78
0.3 -0.02y + 0.10y = 0.78
0.3 + 0.08y=0.78
0.08y=0.78-0.3
y=0.48/0.08 =6
y =6 stamps
Putting bthe value of y =6 into equation 1
x+6=15
x=15-6 =9
Steven used 9 $0.02 stamps and 6 $0.10 stamps
please help!!
factor the quadratic by using the box
Answer:
thus therefore thy answer musnt be 6 thus forth -3
Solve:3x+3y=27 and its algebra
Answer: X=9-y
Step-by-step explanation:
Answer:
x = 9 - y
y = 9 - x
Step-by-step explanation:
Solving for X:[tex]3(x + y) = 27[/tex]
[tex]x + y = \frac{27}{3} [/tex]
[tex]x + y = 9[/tex]
[tex]x = 9 - y[/tex]
Solving for Y:[tex]3(x + y) = 27[/tex]
[tex]x + y = \frac{27}{3} [/tex]
[tex]x + y = 9[/tex]
[tex]y= 9 - x[/tex]
Hence, the answer for x is x = 9 - y and the answer for y is y = 9 - x.
Please help! If you do you will get 'Brainliest'
Answer:
A) 5/7
Step-by-step explanation:
Equation:
-0.7n = -0.5
n = 5/7
PLEASE ANSWER FAST I NEED THIS! Fire in inches of 10 senior boys are 64, 65, 66, 68, 71, 72, 73, 73, 73, and 74. find the mean of the heights.
Answer:
632.4
Step-by-step explanation:
You have to add all the numbers then dived it by ten. Hope this helps all mark me brainlest plzzzz
PLEASE SOLVE THIS ITS URGENT
Help!!!!! Please
!!!!;!;!!;!!;
Answer:
Step-by-step explanation:
(b)
Jordana is putting a fence around a garden that is shaped like a half circle and a rectangle.
A rectangle with length 28 feet and width 14 feet. A semicircle with diameter 14 feet is on top of the rectangle.
How much fencing will Jordana need? Use StartFraction 22 over 7 EndFraction for Pi.
64 ft
86 ft
92 ft
114 ft
Mark this and return
Answer:
92
Step-by-step explanation:
Emerson has some yellow stickers and some green stickers. She
has 30 green stickers and the ratio of vellow stickers to green
stickers is 2.5. How many yellow stickers does Emerson have?
Question 11
125
C
15
Oo
$15
I’m
Answer:
Yes, the answer you chose is correct.
A can of juice has a radius of 5 inches and a height of 8 inches. What is the volume of the can?
Answer:
use your formula and plug it in and solve it
Step-by-step explanation:
7. James earned $13 on Monday and doubled his pay each day thereafter for a week. How
much did he earn on Saturday?
Answer:
416$
Step-by-step explanation:
Which one because it hard am going to keep telling questions
Answer:
56
Step-by-step explanation:
I need help quick plsss??
Answer:
-4.515
Step-by-step explanation:
A car uses 1 liter of gas every 12 kilometers. How many meters can the car travel on 3 liters of gas? 36 meters 3,600 meters 360 meters 36,000 meters
Answer:
36,000 meters. 12km= 12,000m multiply by 3l of gas.
Step-by-step explanation:
The car will travel 36000 meters using 3 liters of gas as per linear equation.
What is a linear equation?"A linear equation is an equation in which the highest power of the variable is always 1. It is also known as a one-degree equation. The standard form of a linear equation in one variable is of the form Ax + B = 0. Here, x is a variable, 'A' is a coefficient and 'B' is constant".
Given, a car uses 1 liter of gas every 12 kilometers.
Therefore, using 3 liters of gas, the car will go
= 3 × 36 kilometers
= 36 kilometers
= 36000 meters
With 3 liters of gas, the car will travel 36000 meters.
Learn more about a linear equation here: https://brainly.com/question/18840245
#SPJ2
Isaac walks 8 km north and then 12 km east. How far is Isaac from his starting point?
Answer:
Step-by-step explanation:
Distance from starting point = 8 + 12 = 20km
ok screw it i need to sneep i can't even do simple addition its too late
sorry
-cheesetoasty
A triangular pyramid has a volume of 48 in3. The base edge is 9 in and the base height is 4 in. Find the height of the pyramid.
Answer:
8 in
Step-by-step explanation:
First of all we have to find the area of the base triangle.
For do this we can use this formula:
A = (base edge x base height)/2
A = (9 x 4)/2 = 18 in^2
The formula for find the volume of a pyramid is:
V= Base area x height)/3
So the height can be find in this way
3 x V = base area x height
height = (3 x V)/base area
height = (3 x 48)/18 = 8 in
Answer:
pretty sure it is 8in I think
Simplify the following expression
Answer:
D
Step-by-step explanation:
i am sure 10000% and plz if it is correct can u give me beainlst
А
E E
С
D
B
If mZACD = 100°, then mZACE = [?]°
Answer:
80 degrees
Step-by-step explanation:
a line is always 180 degrees
one side of that line is 100
so, just subtract 100 from 180
you get 80
180 - 100 = 80
The average rainfall of a prairie land is:
Answer:
Heres the link - https://brainly.com/question/19882225?referrer=searchResults
Step-by-step explanation:
PLEASE HELP ILL GIVE MORE IF ITS RIGHTTTTT
the linear function g is defined by g(x)=4x. show that g(3) and g(2) have a difference of 4.
Answer:
the answer is D.
Step-by-step explanation:
well, the y-intercept for f(x) is at
as you can see from the slope-intercept form is at 4, and it has an slope of 2/3.
for g(x), well an y-intercept is when x = 0, what is it from that table? well, is at 0,3, so when x = 0, y = 3, so no dice on that one.
c)
whenever an x-intercept occurs, y = 0, for f(x) that's at
what about the x-intercept for g(x)? well, let's check, when is y = 0? aha! at -9, 0, so when y = 0, x = -9, so no dice on that one either.
d)
well, what is the slope of g(x) anyway? well, let's pick two points off the table to get it hmmm the first two let's use,
and from a), using the slope-intercept form, we know f(x) has a slope of 2/3.
well, 2/3 is larger than 1/3, so no dice.
b)
well, you already know.
Brainliest and 1 graph helppp :)
Answer: it’s C
Step-by-step explanation:
The value of Tonya's car is $21,000. The car's value depreciates at a rate of 15% per year.
Which function represents the value of the car after t years?
O f(t) = 1.15(21,000)
O f(t) = 21,000(1.15)
O f(t)21,000(0.85)
O f(t) = 0.85(21,000)
Answer:
f(t) = 0.85(21,000)
Step-by-step explanation:
100% - 15% = 85% 0r in decimal form 0.85
0.85 x the original pricen 21,000
Answer:
the answer for this question is: f(t)=21,000(0.85)^t
Step-by-step explanation:
well since its asking what function represents the value, you have to convert the 15 percent into a decimal. so when you put the equation together you can see its 0.85.
hope it helps! :)
In right triangle ABC, m∠ B ≠ m∠ C. Let sin B = r and cos B = s.
What is sin C – cos C?
Answer:
c
Step-by-step explanation:
3(2x+4)=2(9+2x)
I need Help with this one!
And then after, how do I change it so it has no solution at all.
Answer:
x = 3
Step-by-step explanation:
3(2x+4)=2(9+2x)
6x+12=18+4x
6x-4x=18-12
2x=6
x=3
pd: i solve this as an ecuation
what is the souloution to the equation x^2-4x+4=2x
Answer:
x=3+sqrt5, x=3-sqrt5
Step-by-step explanation:
help meeeee please please
Answer:
C) 10 is the answer if this helped brainliest would be appreciated ;)
Step-by-step explanation:
Answer:
10cm
Step-by-step explanation:
15cm-9cm=6cm
KL^2=(8^2)+(6^2)
KL^2=64+36
KL^2=100
KL=10cm
Find the volume of the cone show all your work .
Answer:
hope this helps you out good luck
Please answer this as soon as possible.
Answer:1st one is acute 2nd one is also acute 3rd one is obtuse last one is right
Step-by-step explanation:
Because I learned this already
What is the length of RS?
