Answer:
x = 65, y = - 10
Step-by-step explanation:
Given the 2 equations
2x + y = 120 → (1)
2x - y = 140 → (2)
Adding the 2 equations term by term will eliminate y, that is
4x = 260 ( divide both sides by 4 )
x = 65
Substitute x = 65 into either of the 2 equations and evaluate for y
Substituting into (1)
2(65) + y = 120
130 + y = 120 ( subtract 130 from both sides )
y = - 10
what do you think this is it's all good if you don't know
Answer:
$3.00; $7.29
Step-by-step explanation:
Find what 8% of $37.50 is:
x/37.50 = 8/100
cross multiply
x × 100 = 37.50 × 8
100x = 300
divide both sides by 100
x = 3
$3 is 8% of $37.50
If 8% was added to the bill, then add $3 to $37.50
3.00 + 37.50 = 40.50
Now find what 18% of 40.50 is
x/40.50 = 18/100
cross multiply
x × 100 = 40.50 × 18
100x = 729
divide both sides by 100
x = 7.29
$7.29 is 18% of the bill after sales tax
They tipped $7.29
please offering 8 points and brainilest awnser
Answer: 2,6,10,14
Step-by-step explanation:
Answer:
2,6,10,14
Step-by-step explanation:
2,6,10,14 because X is input and the Y column is output
An art teacher is organizing identical groups of supplies that the teacher can make if there are no colored pencils. what is the greatest number of groups of supplies that the teacher can make if there are no colored pencils left over? how many of each color are in the group of supplies?
Answer:20
Step-by-step explanation:
Solving equations with Fractions?
Answer:
basically just multiply the fractions by a common number until you have whole numbers, then solve like normal
Step-by-step explanation:
helppppp I need to find the points,slope and y-intercept
Answer:
The y-int is -3, There is a point at (-15,0), (-30,3), The slope is -1/5
Step-by-step explanation:
The slope formula is y2-y1/x2-x1 which if you use it for those points, you get -1/5
Hope this makes sense! If you need help, just comment!!
i need help with this geometry
the length between the bases field is 90 feet. A scale drawing shows the distance between the bases as 2 1/2 inches. One inch on this drawing equals how many feet?
Answer:36
Step-by-step explanation:
An equivalent fraction for 2/3 is ____
2/6
10/15
8/15
1/3
is the following a function? each employee's social security number paired with their salary.
a.) not enough information is given
b.) yes, because each employee's social security number is unique and will be paired with just one salary
c.) no, because not all employees will have a social security number
d.) no, because more than one employee will be paired with the salary
Answer:
b.) yes, because each employee's social security number is unique and will be paired with just one salary
Step-by-step explanation:
each employees social security number will be different, but there will be more than one employee with one salary but the employee could be find by the social security number
Can someone answer both of these questions?
Answer:
First one is 1260°
Second one is 720°
Step-by-step explanation:
Hope this helped :)
A recipe states that 5 servings of peanuts have 1,250calories. How many calories is 2 servings of peanuts? *
7 points
Captionless Image
250 calories
375 calories
500 calories
750 calories
Answer:
500 calories
Step-by-step explanation:
divide the 1250 calories by the initial five servings and you get 250 then multiply that by the 2 servings they are asking for and you get 500 calories
Answer:
500
Step-by-step explanation:
you take 1,200 and decide by 5 then take 250 and multiply by 2 to get 500
A calculator screen shows a number in scientific notation as 4.18E‒8. Write this number in standard form.
Answer:
.0000000418
Step-by-step explanation:
So you will start from the decimal and move 8 places to the left.
E-8 is the same as 10^-8 so you will move to the left
If it was E8 you would move to the right 8 places.
Planet Earth has an approximate diameter of 1.2742 · 10 10 millimeters. The sun has a diameter of 1.391 · 10 6 kilometers. Part I: Given that for every one kilometer there are 1,000,000 millimeters, which unit of measurement should be used to best represent the lengths of the sun and Earth's diameters? Part II: Approximate how many times greater the sun's diameter is than planet Earth's.
Answer:
Part 1:
Due to these magnitudes are too big, it is better to use km as a unit of diameter measurement.
Part 2:
The diameter of the sun is approximately 109 times the diameter of the earth.
Step-by-step explanation:
Part 1:
Due to these magnitudes are too big, it is better to use km as a unit of diameter measurement.
So we can rewrite the diameter of the Earth in terms of km, knowing that 1 km = 1000000 mm.
[tex]D_{E}=1.2742\times 10^{10}mm*\frac{1km}{1000000mm}=1.2742\times 10^{4} km[/tex]
Part 2:
We can divide each diameter to find the relation between them.
[tex]\frac{D_{S}}{D_{E}}=\frac{1.391\times 10^{6} km}{1.2742\times 10^{4} km}=109.2[/tex]
Therefore the diameter of the sun is approximately 109 times the diameter of the earth.
I hope it helps you!
Need help to solve 6/4y - 12 = 1/2y - 4
Answer:
6/4y - 12 = 1/2y -4
3/2y -12 = 1/2y - 4
-1/2y -1/2y
2/2y - 12 = -4 (2/2 = 1)
y - 12 = -4
+12 +12
y = 8
Step-by-step explanation:
Given the function f defined by the formula f(x)=2x+1, find f(4). Write just the number
Answer:
1.5
Step-by-step explanation:
thats the answer but i can't post without this extra text
8th grade urgent math super easy please
Answer:
n> -6
Step-by-step explanation:
-35n -28< 182
+28 +28
______________
-35n < 210
n> -6
what is 3x-2-7x = 10x + 4?
Step-by-step explanation:
Step 1: Simplify both sides of the equation.
3x−2−7x=10x+4
3x+−2+−7x=10x+4
(3x+−7x)+(−2)=10x+4(Combine Like Terms)
−4x+−2=10x+4
−4x−2=10x+4
Step 2: Subtract 10x from both sides.
−4x−2−10x=10x+4−10x
−14x−2=4
Step 3: Add 2 to both sides.
−14x−2+2=4+2
−14x=6
Step 4: Divide both sides by -14.
−14x−14=6−14
x=−3/7
Answer:
x=−3/7
The value of x is -3/7.
What is Equation?Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.
It demonstrates the equality of the relationship between the expressions printed on the left and right sides. LHS = RHS is a common mathematical formula.
Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.
Given:
3x-2-7x = 10x + 4
Now, solving for x
3x-2-7x = 10x + 4
-4x - 2= 10x + 4
-4x - 10x = 4 + 2
-14x = 6
x= -6/14
c= -3/7
Hence, the value of x is -3/7.
Learn more about equation here:
https://brainly.com/question/10413253
#SPJ5
8(-a+4)=-6a-8+8a
Can y’all help me
Answer:
a = 14.4
Step-by-step explanation:
8a/8 = a 8(-a+4)/8=-a+4 equation is now -a+4=-6a-8
-6a/-6 = a -a/-6=1/6a equation is now 1/6a + 4 = a-8
a-8 + 8 = a 1/6a + 4 + 8 = 1/6a + 12 equation is now a = 1/6a+12
5/6 are left of the variable 12/5=2.4 12 + 2.4 = 14.4
I need help but ill give brainless but dont guess actally try cuz i dont get it
Answer:
The length of AB is 3 squares
Length of A' B' is 9 squares
Point A is (2,1)
Point a' is ( 6,3)
Step-by-step explanation:
I am not sure what the scale factor is though. I have never heard of it. Sorry!
Mr. Vasquez ordered 5,512 pounds
of bananas each month for his
grocery store last year. How many
pounds of bananas did he order last
year?
Answer:
66,114 pounds of bananas.
Step-by-step explanation:
There are 12 months in a year, multiply 5,512 and 12 to get one year.
A rectangular swimming pool measures 50 meters in length and 25 meters in width. What are the length and width of your scaled drawing with a scale of 1 centimeter represents 5 meters?
Answer:
10 cm by 5cm
Step-by-step explanation:
We know that for every 5 meters, there will be 1 centimeter. The pool is 50 meters by 25 meters. So to find this in terms of centimters, divide by 5 to get 10 cm by 5 cm.
!/8 pound of fertilizer covers 25 square feet of ground, how much fertilizer, in pounds, is needed to cover 1 square foot ground?
Answer:
1/200 poundsStep-by-step explanation:
Given ratio
1/8 pound ⇔ 25 square feetTo find
x ⇔ 1 square footDivide both sides by 25
1/8÷25 pounds ⇔ 25÷25 square feet1/200 pounds ⇔ 1 square foot100 to 150
options:
option 1: 50% decrease
option 2: 50% increase
option3: 33%increase
option 4: 1/2% increase
Answer:
50% increase
hope this helped
HELP WILL MARK YOU BRAINLIEST HURRY IM ON A TIME LIMIT!’
(3x+5)+(x+3)=180
4x+8=180
4x=172
x=43
3(43)+5
<PQR=134
<SQR=46
Answer:
[tex]\boxed {\angle PQR = 134\textdegree}[/tex]
Step-by-step explanation:
Both angles are Supplementary (Two angles that add up to 180°). So, write an expression using the following measurements of both [tex]\angle PQR[/tex] and [tex]\angle RQS[/tex] and 180:
[tex]\angle PQR = 3x + 5[/tex]
[tex]\angle RQS = x + 3[/tex]
[tex]3x + 5 + x + 3 = 180[/tex]
Solve:
[tex]3x + 5 + x + 3 = 180[/tex]
[tex]4x + 5 + 3 = 180[/tex]
[tex]4x + 8 = 180[/tex]
[tex]4x + 8 - 8 = 180 - 8[/tex]
[tex]4x = 172[/tex]
[tex]\frac{4x}{4} = \frac{172}{4}[/tex]
[tex]x = 43[/tex]
-After you have the value of [tex]x[/tex], use it to the expression of [tex]\angle {PQR}[/tex] to get the actual answer of [tex]\angle PQR[/tex]:
-The value of [tex]x[/tex]:
[tex]x = 43[/tex]
-Solve for the measurement of [tex]\angle PQR[/tex]:
[tex]3x + 5[/tex]
[tex]3(43) + 5[/tex]
[tex]129 + 5[/tex]
[tex]134[/tex]
-The measurement of [tex]\angle PQR:[/tex]
[tex]\boxed {\angle PQR = 134\textdegree}[/tex]
1 point
Solve: 0.75 (x + 200) = 150.5 (2 – 28)
type your answer...
Answer:
[tex] \huge \: x = - 5417.33[/tex]
Step-by-step explanation:
[tex]0.75 (x + 200) = 150.5 (2 – 28) \\ [/tex]
Expand the terms and simplify
That's
[tex]0.75x + 150 = 301 - 4214 \\ 0.75x + 150 = - 3913[/tex]
Subtract 150 from both sides of the equation
[tex]0.75x + 150 - 150 = - 3913 - 150 \\ 0.75x = - 4063[/tex]
Divide both sides by 0.75
[tex] \frac{0.75x}{0.75} = - \frac{4063}{0.75} \\ x = - 5417.333333[/tex]
We have the final answer as
x = - 5417.33Hope this helps you
6. In the quadratic equation x2 + 8x - 2 = 0, what are the values of a, b, and c?
a. a = 0, b = 3, C = -1
c. a = -3, b = 0, C = -1
b. a = 1, b = 8, C = -2
d. a = 3, b = 0, C = 1
Step-by-step explanation:
letter b ang sagot sa number 6
Rewrite x/-4 ≥ -1 so the negative sign in the fraction is with x. Then multiply each side by 4. What inequality do you get?
Answer:
hii
Step-by-step explanation:
the endpoints of line GH are G(0,4) and H(-6,2). find the coordinates of the midpoint M
Answer: The point G is G(18,-9)
Step-by-step explanation:
Midpoint:
Write the formula for midpoint of the A(x_1,y_1) and B(x_2,y_2).
[(x_1+x_2)/2,(y_1+y_2)/2]
G(x,y), H(-2,9)
(8,0) =[(x+(-2))/2,(y+9)/2]
(x+(-2))/2 =8
(x+(-2))=16
x-2 =16
x =18
(y+9)/2=0
y+9=0
y=-9
The point G is G(18,-9)
(answer found from user homeworkhelp on mathskey.com)
Please help ASAP thank you
Step-by-step explanation:
1.) x + 37 + x + 67 + 90 = 180
combine like terms
2x +194 = 180
subtract 194 both sides
2x = -14
x = -7
2.) 63 + 86 = x
x = 149
Answer:
1. (x+37) + (x+67) + 90° = 180°
=> x + x + 37 + 67 + 90 = 180
=> 2x +194 = 180
=> 2x = 180 –194
=> 2x = –14
=> x = –14/2
=> x = –7
2. [The measure of an exterior angle of a triangle is equal to the sum of the measures of the two non-adjacent interior angles. ]
x = 63° + 86°
=> x = 149°
A 112-inch pipe is cut into two pieces. One piece is three times the length of the other. Find the length of the shorter piece.
Let the smaller piece be x .
Then the larger angle will be = 3x
An equation to find the length of each of the two pieces :-
[tex]x + 3x = 112[/tex]
[tex]4x = 112[/tex]
[tex]x = \frac{112}{4} [/tex]
[tex]x = 28[/tex]
Which means :-
Length of the shorter piece = 28 inches
Length of the larger piece = 28 × 3 = 84 inches
Therefore , the length of the shorter piece = 28 inches .