Solve the simultaneous equations
2y - 5x = 9
4y + 3x = 5
Do not use trial and improvement
Answer:
y = 2, x = -1
Step-by-step explanation:
2y - 5x = 9
2y = 9+5x
y = (9+5x) /2
4y + 3x = 5
4((9+5x) /2) + 3x = 5
13x + 18 = 5
13x = -13
x = -1
y = (9+5x) /2
y = (9+5(-1)) /2
y = 2
Answer:
x = -1, y = 2
Step-by-step explanation:
2y - 5x = 9
4y + 3x = 5
eliminate one of the variables by multiplying the equations and then adding them together.
3(2y - 5x = 9)
5(4y + 3x = 5)
6y - 15x = 27
20y + 15x = 25
26y = 52
y = 2
now input the value of y into one of the original equations to find x.
8 + 3x = 5
8-5 = 3
x = -1
How do you make comparisons between an equation and a verbal description?
Answer:
equtions have mathematical signs and descritions are like riddles and you have to figure out the operation
Step-by-step explanation:
When The equations have mathematical signs and also descriptions are like riddles. Then we have to figure out the operation.
What are Equation and Verbal descriptions?Equation Verbal description
y = T-shirts are being
1.25x sold in a store for
$5.25 each.
A variable is a missive used to represent a value or unexplored quantity that can modify or vary in an expression or equation.
An utterance is a variety of variables, quantities, and mathematical functions; 4, 8 x, and b + 102 are all expressions.
An equation is an presentation set equal to another expression; a = 4, 1 + 23 = x + 9, and (2 + 3)1 = 2 c. are all equations. 1 3. 6. 1: Formation Processes from Context.
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Helpppppppp helpppppppp
Answer:
D
Step-by-step explanation:
divide the fraction lol
Answer:
D
Step-by-step explanation:
gchchchxhccydhdjchhxxhxchxxhbddbxbdbhdxh
What type of triangle has exactly 2 equal sides and one right angle?
isosceles triangle
right isosceles triangle
obtuse isosceles
right triangle
Answer:
Right isosceles triangle
Step-by-step explanation:
I took the quiz and got it wrong, but it told me the correct answer
A right isosceles triangle has exactly 2 equal sides and one right angle.
Given that, a triangle has exactly 2 equal sides and one right angle.
Isosceles triangle: An isosceles triangle is a triangle that has two sides of equal length.
Right isosceles triangle: An isosceles right triangle is defined as a right-angled triangle with an equal base and height which are also known as the legs of the triangle.
Obtuse isosceles: An isosceles obtuse triangle is a triangle in which one of the three angles is obtuse (lies between 90° and 180°), and the other two acute angles are equal in measurement.
Right triangle: A right triangle is a triangle in which one angle is 90°.
Hence, right isosceles triangle has exactly 2 equal sides and one right angle.
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Why is it a problem to find the square root of a negative number, for example √-4?
Answer:
It is not possible because no number times itself can equal a negative number.
Answer:
Taking the square root of a negative number is a problem because this technically does not follow the rules of a square root. A square root is made of a number times itself, and therefore, is impossible to have a negative times a positive to make a negative total (An example would be √4, as the answer can be 2 (because 2 x 2 = 4) or -2 (because -2 x -2 = 4)).
This means that in order to solve √-4, you must use imaginary numbers. This is represented by "i."
For the example of √-4, your answer would be 2i. These imaginary numbers are used whenever you are square rooting a negative number in order to show that it is breaking the real rules of roots.
Anyone know the answer to this?
if 15 of the 1001
cars in a parking
lot are white,
how many cars
are white?
Answer:
15...
Step-by-step explanation:
Is this the full question?
I guess the question is somewhat incomplete. Please check and post again.
Malaya is following this recipe for bread rolls.
She uses 400 g of flour.
How much of the other ingredients does she use?
Recipe: Makes 14 bread rolls
700 g flour
14 g salt
7 g yeast
35 mL oil
420 mL water
Answer:
Step-by-step explanation:
400/700 = 4/7
salt: 4/7 × 14 g = 8 g
yeast: 4/7 × 7 g = 4 g
oil: 4/7 × 35 mL = 20 mL
water: 4/7 × 420 mL = 240 mL
please help, it's due in less then 30 minutes :')
Answer:
The answer is b. the range of Greta's graph is y<0
Step-by-step explanation:
Jason has 1/3 of a liter of milk. Jason divides the milk equally into 4 mugs of tea.
How much milk will Jason have in each mug?
Answer:
1/12 l
Step-by-step explanation:
Amount of milk = 1/ 3 l
No: of mugs = 4
Amount in each mug = 1/3 ÷ 4 = 1/3 x 1/4 = 1/12 l
(Hope its right!)
Answer:
They will have 1/12 of a liter of milk on each mug because you are dividing 1/3 into 4 so the denominator is multiplied by 4
Please help slope!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
It is -1/6 so ye hope this helps
Linda and Philip share £54 in the ratio 4:5. Find how much money each of them will recieve
Answer:
Linda has £24 and Philip has £30.
Step-by-step explanation:
Denote a variable to the amount of money Linda and Philip have:
Money Linda has = L
Money Philip has = P
L + P = 54
There is a ratio of 4:5 so for every £4 Linda has, Philip will have £5. When adding both values, 4+5, you get 9.
Divide the total amount of money by the sum of the ratio numbers so 54/9 which gives 6.
Multiply the number you get from the division by their respective ratios.
Linda = 6 * 4 = 24
Philip = 6 * 5 = 30
Add both numbers if you want to make sure the answer is correct.
I need help with this please.
-2 (x) = -2 ( x-14)
Answer:
There are no solutions.
Step-by-step explanation:
−2x=−2(x−14)
-2x=(−2)(x)+(−2)(−14)
-2x=−2x+28
-2x+2x=−2x+28+2x
0= 28
1. The height of a missile t seconds after it has been fired is given by h=4.9t^2+44.1t. How many seconds will it take for the rocket to reach its greatest height?
Answer:
The rocket will take 4.5 seconds to reach its maximum height.
Step-by-step explanation:
The height of a missile t seconds after it has been fired is given by h=-4.9*t²+44.1*t
This function is a quadratic function of the form f (x) = a*x² + b*x + c. In this case a=-4.9, b=44.1 and c=0
To calculate how many seconds it will take for the rocket to reach its maximum height, I must calculate the maximum of the function. The maximum of a quadratic function is the vertex of the parabola. The x coordinate of the vertex will be simply: [tex]x=\frac{-b}{2*a}[/tex]. The y coordinate of the vertex corresponds to the function evaluated at that point.
In this case the x coordinate of the vertex corresponds to the t coordinate. In other words, by calculating the x coordinate of the vertex, you are calculating the maximum time t it will take for the rocket to reach its maximum height. So:
[tex]t=\frac{44.1}{2*(-4.9)}[/tex]
t=4.5
The rocket will take 4.5 seconds to reach its maximum height.
what is 150 times 100
Answer:
100×150
it's the answer
Complete the statement. Round to the nearest hundredth if necessary.
15 lb ≈ ? kg
Answer:
6.82 kg
Step-by-step explanation:
set up a proportion based on 2.2 lbs in 1 kg
2.2/1 = 15/x
cross-multiply:
2.2x = 15
x = 6.82
The value of 15 lb in kg is 6.81 kg.
What is Multiplication?To multiply means to add a number to itself a particular number of times. Multiplication can be viewed as a process of repeated addition.
We know that;
⇒ 1 lb = 0.454 kg
Hence, We get;
⇒ 1 lb = 0.454 kg
⇒ 15 lb = 15 × 0.454 kg
= 6.81 kg
Thus, We get;
⇒ 15 lb = 6.81 kg
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A game is considered "fair" if the player can expect to win $0.
Which is a fair game?
A Game A
cost to play: $1
prize: $5
probability of winning: 0.2
Game C
cost to play: $3
prize: $20
probability of winning: 0.1
B Game B
cost to play: $2
prize: $10
probability of winning: 0.3
Game D
cost to play: $4
prize: $10
probability of winning: 0.5
Answer:
eeuu
Step-by-step explanation:
dijud
cost to play: $4
prize: $10
probability of winning: 0.5
Step-by-step explanation:
Cassie simplified the composed function f(x)= cot(arcsin x). Her work is shown below.
In which step did Cassie make her first error?
step 1
step 2
step 3
step 4
She didn't make any errors
Answer:
1. C
2. A
3. A
4. D
Step-by-step explanation:
PLEASE HELP I NEED THIS BEFORE 8:00 pm
Answer:
y = -27
Step-by-step explanation:
-3 * 3 = -9 * 2 = -18/9 = -27
Answer:
The answer is Y=-27
Step-by-step explanation:
Hope this helped
Fill in the table using this function rule.
y = -3x+5
x:
-4
-2
0
2
Answer:
x=5/3 or 2
Step-by-step explanation:
If 16 units of chlorine are needed for every 1250 gallons of water. How many units of chlorine are needed for 625 gallons of water? a. 12 units b. 10 units c. 8 units d. 5 units
Answer:
8 :)
Step-by-step explanation:
Antonio has a bag of mixed candies. He has 5 green, 7 yellow, and 4 red. What is the probability that Antonio will pick a yellow candy?
Answer: 43.75%
Good Luck!
Tell whether (3,5) is a solution of y = 5x – 10.
Answer:
yes it is
Step-by-step explanation:
plug x and y in
3 * 5 - 10 = 5 <== And this is true
Answer:
The answer would be yes.
After the math contest, Basil noticed that there were four extra-
large pizzas that were left untouched. In addition, another three
slices of pizza were uneaten. If there were a total of 51 slices of
pizza left, how many slices does an extra-large pizza have?
MATH
CONTEST
3:30
RM
105
EX PIZZA
EX.16. DIZZA
XG. PIZZA
X LG PIZZA
14
12.
15
Answer:
correct answer = 12
Step-by-step explanation:
the extra large pizza contains = 12 slices of pizza.
plz mark my answer as brainlist plzzzz.
hope this will be helpful to you ☺️
Answer:
An extra large pizza has 12 slices
Write the absolute vale of |3-5|
Answer:
2
Step-by-step explanation:
3-5 = -2
absolute value of -2 is 2.
please do ALL 3 will give brainliest!! and a surprise!!!
Answer:
a) -2.5x+3.9+1.7x
circle: 2.5x and 1.7x
variables: x
b) 1 1/2+t+2/3s
no like terms
variables: s and t
c) 15k+2/3k+3m
circle: 15k and 2/3k
variables: k and m
For which of the following is x = 5 NOT a solution
(a) 12 + 3x = -15
(b) 2x − 6x = -20
(c) 18 = 13 + x
(d) -4x = x − 25
Answer:
A) x= -9
B) x=5
C) x=5
D) x=5
Step-by-step explanation:
y-8= - * - 4
y=-*
4
(3,-5)
no solution
an infinite number of solutions
Given:
The system of equation is
[tex]y-8=-\dfrac{1}{3}x-4[/tex]
[tex]y=-\dfrac{1}{3}x-4[/tex]
To find:
The solution of given system of equations.
Solution:
The slope intercept form of a line is
[tex]y=mx+b[/tex]
Where, m is slope and b is y-intercept.
Write the given equation in slope intercept form.
The first equation is
[tex]y-8=-\dfrac{1}{3}x-4[/tex]
[tex]y=-\dfrac{1}{3}x-4+8[/tex]
[tex]y=-\dfrac{1}{3}x+4[/tex] ...(i)
Here, slope is [tex]-\dfrac{1}{3}[/tex] and y-intercept is 4.
The second equation is
[tex]y=-\dfrac{1}{3}x-4[/tex] ...(i)
Here, slope is [tex]-\dfrac{1}{3}[/tex] and y-intercept is -4.
Since the slopes of both lines are same but the y-intercepts are different, therefore the given equations represent parallel lines.
Parallel lines never intersect each other. So, the given system of equation has no solution.
Hence, the correct option is B.
The measure of angle Y is 45°, and the measure of angle Z is 70°.
Z
W
Y
What is the measure of angle W?
25°
65°
1150
120°
Answer:
115 degrees
Step-by-step explanation:
We know that angle y is 45 degrees and angle z is 70 degrees so to find x, you do 180-45-70 to get 65 degrees.
Because W plus X has to equal 180 degrees, 180-65=115, so the answer is 115 degrees
Answer:
choice 3) W = 115 degrees
Step-by-step explanation:
all triangle interior angles add up to 180 degrees
180 = 45 + 70 + X
X = 65 degrees
Angle W is supplemental to angle X (angle W and angle X add up to 180 degrees.)
W = 180 - 65 = 115 degrees
