Answer:
16
Step-by-step explanation:
n=pens
n+9=25
solve for n
n=16
Answer:
8 pens, 17 pencils
Step-by-step explanation:
Let the number of pens be x.
x+9+x=25
2x=16
x=8
Lets check our work:
8+9+8= 25
There are 8 pens.
Elsa got a prepaid debit card with $15 on it. For her first purchase with the card, she bought some bulk ribbon at a craft store. The price of the ribbon was 7 cents per yard. If after that purchase there was $12.83 left on the card, how many yards of ribbon did Elsa buy?
Answer:
31 yards
Step-by-step explanation:
If she has $12.83 left, that means she spent $2.17 out of the $15
15 - 12.83 = 2.17
One cent is .01 of a dollar
So that would be $0.07 per yard
To find the number of yards, we need to divide the total amount she spent by the price per yard.
2.17 ÷ 0.07 = 31
solve the systems of linear equations using substitution
1.x-4y=-10 2.a-3b=24
2x+y=-11 a+2b=-16
3.4j-5k=27 4.m+n=-3
k=j-7 m-4n=27
Step-by-step explanation:
1 . x - 4y = -10
2x + y = -11
multiply the first equation with 2
2x - 8y = -20
-
2x + y = -11
===============
= 0 - 9y = -9
y = 1
x = -6
-------------------------------------------
2.
a - 3b = 24
-
a + 2b = -16
=============
= 0- 5b = 40
b = - 8
a = 0
and so on
Solve the following equation:
X+m=p-n for p
Answer:
p = m + n + x
Step-by-step explanation:
x + m = p - n
x + m + n = p
p = m + n + x
Add. Write your answer in simplest form.
5 1/5 + 4 3/5 =
A. 10 1/5
B. 9 2/5
C. 10 4/5
D. 9 4/5
PLEASE HELP AND EXPLAIN THANK YOU
Answer:
d. 9 4/5
Step-by-step explanation:
5+4=9
1/5+ 3/5=4/5
So then you'll get 9 4/5
x • 1 + x/1=? ,,,,,,,,,,,,,,,,,,,,,
[tex] \huge \boxed{\mathfrak{Question} \downarrow}[/tex]
[tex] \large \sf \: x \cdot 1 + \frac { x } { 1 } = ? \\ [/tex]
[tex] \huge \boxed{\mathfrak{Answer} \downarrow}[/tex]
[tex] \large \sf \: x \cdot 1 + \frac { x } { 1 } \\ [/tex]
Anything divided by one results in itself.
[tex] \large \sf \: x\times 1+x [/tex]
Combine x × 1 and x to get 2x.
[tex] = \large \boxed{ \bf \: 2x}[/tex]
The correct answer is 2x.- 13 -2
2 - [ -1]³ + [ 1 6 ] - [ - 1 - [ - 3 ] |
23
Step-by-step explanation:
2 - [ -1]³ + [ 1 6 ] - [ - 1 - [ - 3 ]
= 2-[-1] + [16] -[-1]-[-3]
= 2+1+16+1+3
= 3+16+4
=3+20
= 23
An object is moving at a speed of 3 kilometers per hour. Express this speed in feet per minute. Round your answer to the nearest whole number.
Answer:
164 feet per minute
Step-by-step explanation:
3 kilometers is ~9842.52 feet
Since it moves 9842.52 feet per hour, we can just divide that number by 60 which gives us 164.042 feet. Rounded it's 164 feet
please find value of x and y
Answer:
X=x=−5y/3
y=x=−5y/3
Step-by-step explanation:
2x+y/3⋅1/x−3y=1/3⋅1/2=x=−5y/3
Answer:
x = [tex]\frac{5}{7}[/tex] , y = - [tex]\frac{3}{7}[/tex]
Step-by-step explanation:
Given 2 equal matrices then the corresponding elements in each matrix are equal, then
2x + y = 1 → (1)
x - 3y = 2 → (2)
Multiplying (1) by 3 and adding to (2) will eliminate y
6x + 3y = 3 → (3)
Add (2) and (3) term by term to eliminate y
7x + 0 = 5
7x = 5 ( divide both sides by 7 )
x = [tex]\frac{5}{7}[/tex]
Substitute this value into (1) and evaluate for y
[tex]\frac{10}{7}[/tex] + y = 1 ( subtract [tex]\frac{10}{7}[/tex] from both sides )
y = [tex]\frac{7}{7}[/tex] - [tex]\frac{10}{7}[/tex] = - [tex]\frac{3}{7}[/tex]
how do you write 750 gallons to 14 minutes as a unit rate
it takes 4 people 2 days to build a wall. how long will it take for 2 poeple to build the same wall?
Please help me I need help
Answer:
d=14
Step-by-step explanation:
1d/6+2/3=1(d-2)/4
Find the L.C.M.
d+4/6=d-2/4
Cross multiply
4d+16=6d-12
Collect like terms
16+12=6d-4d
28=2d
Divide through by the coefficient of d
2d/2=28/2
d=14
Answer:
d = 20
Step-by-step explanation:
1/6*d + 2/3 = 1/4*(d - 2) do the multiplying
d/6 + 2/3 = (d-2)/4 now add fraction
d/6 + 2/3 to add these up we need to multiply 2/3 with 1/2 and it will be 4/6
d/6 + 4/6 = (d+4)/6
(d+4)/6 = (d-2)/4 cross multiply
4d + 16 = 6d - 24 add like terms
16 + 24 = 6d - 4d
40 = 2d divide both sides by 2
20 = d
Elsa got a prepaid debit card with $15 on it. For her first purchase with the card, she bought some bulk ribbon at a craft store. The price of the ribbon was 7 cents per yard. If after that purchase there was $12.83 left on the card, how many yards of ribbon did Elsa buy?
We need to find the yards of ribbon that Elsa bought with her debit card.
The amount of ribbon that Elsa bought was 31 yards.
Initial amount which is present on the card is [tex]\$15[/tex]
Amount left after spending is [tex]\$12.83[/tex]
Amount spent on ribbon is [tex]15-12.3=\$2.17[/tex]
Converting to cents
[tex]2.17\times 100=217\ \text{cents}[/tex]
Cost of one yard of ribbon is [tex]7\ \text{cents}[/tex]
[tex]1\ \text{yd}=7\ \text{cents}\\\Rightarrow 1\ \text{cent}=\dfrac{1}{7}\ \text{yd}\\\Rightarrow 217\ \text{cents}=\dfrac{217}{7}=31\ \text{yd}[/tex]
The yards of ribbon that Elsa bought is [tex]31\ \text{yards}[/tex].
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For number 8 name the angle vertical to
Answer:
the angle vertical to angle VZY is angle XZW.
hope it helps.stay safe healthy and happy.find the gradient of the line 3y=2x/3+4
Answer:
slope is also known as gradient
here gradient =2/9
WILL GIVE BRAINLIEST
(3x – 14) (2x + 10)
Find the value of x.
Answer:
(3x - 14) = (2x+ 10) { Because the angles are vertically opposite to each other}
3x-2x= 14+10
x=24
Help need help please
Convert 6.350 to a fraction
Answer:
[tex]6 \frac{350}{1000}[/tex] Is the answer, if you want it simplified then, [tex]6 \frac{7}{20}[/tex]
Step-by-step explanation:
Answer:
[tex]{ \sf{ \underline{answer \: is \: \: 6 \frac{7}{20} }}}[/tex]
Step-by-step explanation:
Hope you got the idea in previous answer.
[tex]6.350 = \frac{6350}{1000} [/tex]
reduce the fraction by 10:
[tex] = \frac{6350 \div 10}{1000 \div 10} \\ \\ = \frac{635}{100} [/tex]
then reduce it by 5:
[tex] = \frac{635 \div 5}{100 \div 5} \\ \\ = \frac{127}{20} [/tex]
in mixed fraction mode:
[tex] = 6 \frac{7}{20} [/tex]
what number is farther away from 2,300? -125 or -220
subject: math
Answer:
-220
Step-by-step explanation:
2,300-1 then we go into the negatives 0- -2,300
so if -5 is further from 0 than -4 that means the larger number is further
For any two integers a and b, (a + b)2 = a2 + b?
true or false
Answer:
False.
Step-by-step explanation:
Using the property of distribution, (a + b)² will be a² + b², never a² + b.
No, for any two integers a and b, (a + b)² ≠ a² + b is a false statement.
What is termed as the distributive property of multiplication?Multiplication's distributive property allows you to simplify expressions in which you multiply a number by the a sum or difference. This property states that the product of a sum or difference of two numbers is equal to the sum as well as difference of the products. When you multiply a value by a sum, the distributive property of multiplication over addition is used.For the given two integers a and b,
The given expression
(a + b)² = a² + b (false statement)
The correct statement is-
(a + b)² = (a + b)(a + b)
(a + b)² = a² + b² + 2ab
Thus, no, for any two integers a and b, (a + b)² ≠ a² + b.
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What is the solution to 12 = 3/4x
Answer:
3
Step-by-step explanation:
2
Please help me it’s math coordinates planes
Answer:
(4.5 , 2.5)
Step-by-step explanation:
The midpoint can be found with the formula
[tex]midpoint = ( \frac{x1 + x2}{2} ).( \frac{y2 + y1}{2} )[/tex]
and (x1 , x2 ) , (x2, y2) are the coordinates of two points, and the midpoint is a point lying equidistant and between these two points.
A water pipe has an outside diameter of 1 1/4 inches and a wall thickness of 5/16 inches. what is the inside diameter of the pipe?
Answer:
Step-by-step explanation:
There's a small trick here. You have to double the thickness. Why? Because the outside diameter goes through the thickness twice.
Inside diameter = outside diameter - 2 * thickness
outside diameter = 1 1/4 inches
thickness = 5/16
Inside diameter = 1 1/4 - 2 * 5/16
inside diameter = 5/4 - 10/16
Inside diameter = 5/4 - 5/8
Inside diameter = 10/8 - 5/8
Inside diameter = 5/8
Which of the following are the coordinates of the vertex of y = −x2 + 2x + 1? (2, 1) (1, –2) (1, 2) (–2, 1)
Answer:
C
Step-by-step explanation:
We want to determine the vertex of the quadratic equation:
[tex]\displaystyle y = -x^2 + 2x + 1[/tex]
Recall that the vertex is given by the formulas:
[tex]\displaystyle \text{Vertex} = \left(-\frac{b}{2a}, f\left(-\frac{b}{2a}\right)\right)[/tex]
In this case, a = -1, b = 2, and c = 1.
Determine the x-coordinate of the vertex:
[tex]\displaystyle x = -\frac{(2)}{2(-1)} = 1[/tex]
To determine the y-coordinate, evaluate the function at x = 1:
[tex]\displaystyle \begin{aligned} y(1)&= -(1)^2 + 2(1) + 1 \\ &= 2\end{aligned}[/tex]
In conclusion, the vertex of the quadratic equation is (1, 2).
Hence, our answer is C.
PLEASE HELP ILL GIVE 5 POINTS X2
Which functions have zeroes in their domains? Need help ASAP. please and thank u :))))))
I use a app on my phone called (photòmath) and it helps so much.
How much do $10 pieces of candy cost if 1000 pieces cost $20
Answer:
50 pcs
Step-by-step explanation:
say
1000 pcs / $20
so 50 pcs / $
then
$10 * 50 pcs / $ = 500 pcs
Clarisse is selling lemonade in her front yard for $0.50 per glass. Each glass is 1/8 of a pitcher. How much money can she make if she sells 5 pitchers?
Answer:
$20
Step-by-step explanation:
0.50×8=4
4×5=20
50 cents per 1/8 of a pitcher so that would mean that 2/8 or 1/4 would be a dollar and if you keep going like that you will get to 4, then you multiply 4 and 5 to get 20.
Can I please have brainliest?
Use f(x) = 1/2 and f^-1(x) = 2x to solve the problems.
f(2)=
f^-1(1) =
f^-1(X2)) =
Answer:
Solution:
When X=2
f(2)=1/2
= 1/2
When X= 1
f^-1(1)= 2*1
=2
When X=2
f^-1(2)=2*2
= 4
Step-by-step explanation:
I don't know if these are correct and if that last question is f^-1(2) or not.
............-4
6.7x10 =
Answer:
The Answer is -467
Step-by-step explanation:
all it did was move the decimal to the right once
The endpoints of ST are -15 and 25. Find the coordinate of the midpoint M
Answer: 5
Step-by-step explanation:
The coordinate of the midpoint M = 5
What is a Line Segment?A line segment is defined as a measured path between two places. Line segments can make up any polygon's sides because they have a set length.
The figure given below shows a line segment ST, where the length of line segment ST refers to the distance between its endpoints, S and T.
Given that M is the midpoint of ST
S______________M______________T
What is Midpoint?
A midpoint is defined as in the middle of the line connecting two points a position known as a midpoint. A location in the middle of a line connecting the two points that are equally far from both points is the midpoint.
The endpoints of ST are -15 and 25.
So the midpoint between S and T is given by,
⇒ M = (25 - 15)/2,
⇒ M = 10/2
⇒ M = 5
Hence, the coordinate of the midpoint M = 5
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