Solve the simultaneous equations. to. 3 significant figures.
3x^2 + y^2 = 20
2x + y =3
Answer:
check explanation
Step-by-step explanation:
in eqn 2,
y = 3 - 2x
substitute for it in eqn 1
3x² + y² = 20
3x² + (3 - 2x)² = 20
3x² + 9 - 12x + 4x² = 20
Group like terms;
3x² + 4x² - 12x = 20 -9
7x² - 12x = 11
x(7x - 12) = 11
x = 11,
OR
7x - 12 = 11
7x = 11 + 12
7x = 23
x = 23/7
x = 3.286
To get y, substitute for x in eqn 2
WHEN x = 11,
y = 3 - 2(11)
y = 3 - 22
y = -19
WHEN x = 3.286
y = 3 - 2(3.386)
y = -3.772
plz help w maths lit
Answer:
WHAT
Step-by-step explanation:
is the mistake one two three or is their no mistake
Answer:
the mistake is that to "remove" the 1/2 on the left you would have to multiply by 2 (or divide by 1/2 but no one does that)
the result would be that 2h-4 = 10 should actually be 2h-4 = 20
Step-by-step explanation:
Geometry question. Parallel lines. “Find value of x that will make A||B”
Answer:
x = 11
Step-by-step explanation:
These angles are alternate exterior angles which means they are equal to each other:
5x + 9 = 6x - 2
5x - 6x = -2 - 9
-x = -11
x = 11
please help i hate geometry
Answer:
a) 4/5 b) -3/4
Step-by-step explanation:
lines that are parallel have the same gradient. So the gradient is 4/5
Lines that are perpendicular have "opposite reciprocal" gradient: flip the sign, then flip the numerator and denominator (top/bottom). So the gradient is -3/4
Answer:
a) 4/5 b) -3/4
Step-by-step explanation:
lines that are parallel have the same gradient. So the gradient is 4/5
Lines that are perpendicular have "opposite reciprocal" gradient: flip the sign, then flip the numerator and denominator (top/bottom). So the gradient is -3/4
Find the value of x. Write your answer as a fraction, if necessary. 4/9, 5/9, x
Answer:
can you give us the expression, please? we'll try to answer it ! but first you need to give us something to work with ':)
Answer:
0.12
Step-by-step explanation:
Solve the Proportion
5 = x
-- --
12 36
Answer:
[tex]x = 15x[/tex]
Step-by-step explanation:
[tex] \frac{5}{12} = \frac{x}{36} [/tex]
[tex] \frac{5 \times 36}{12 } = x[/tex]
[tex]5 \times 36 = 12x[/tex]
[tex]180 = 12x[/tex]
[tex]12x = 180[/tex]
[tex]12x \div 12 = 180 \div 12[/tex]
[tex]x = 180 \div 12[/tex]
[tex]x = 15[/tex]
Solve for x.
21)
60°
8x
80°
Answer:
x = 5
Step-by-step explanation:
Sum of angles = 180, so
60 + 80 + 8x = 180
140 + 8x = 180
8x = 180 - 140 = 40
x = 40/8 = 5
Simplify: 6m2,2 – 3mn + 14mn + 10m²n2 + 9 O 27m2n2 + 9 16m?n? + 11mn + 9 16m4n" + 1lm?n? + 9 0 16mn+ 17mn + 9
Answer:
2nd one is the ans
16m*2n*2+11mn+9
Please help me with number 5.
Answer:
D
Step-by-step explanation:
multiply the packs with the amount of bottles in each one. then subtract the number you got when you multiplied 4x8. I'm not good at explaining but hope this helps
Solve for x.
X
I need the. Value please
Answer:
45 degrees
Step-by-step explanation:
Hi there!
We're given that one of the triangle's exterior angles is 90 degrees. Using that, we can solve for the corresponding interior angle by subtracting 90 from 180 degrees:
180-90 = 90
Given that the two legs of this right triangle are of equal length, we know that the remaining two angles both measure x. Knowing that the sum of the interior angles in a triangle is 180 degrees, we can set up an equation:
x+x+90=180
2x=90
x=45
Therefore, x is 45 degrees.
In fact, any right triangle with legs of equal length will be a 45-45-90 triangle, meaning the other two angles measure 45 degrees.
I hope this helps!
100 POINTS AND CROWNED BRAINLIEST!!! PLS HELP ONLY 30 MINS LEFT!!
Determine whether each equation represents y as a function of x.
y= l 4-x l
what is the domain of y=cos 0
Answer:
The domain of y = cos θ is all real numbers. This is because any real number can be plugged in for θ and y will be equal to a real number. This can be shown graphically because the y = cos θ will go on infinitely both to the right and left.
Order the following numbers from least to greatest. 4,-2,-3,5,-1
Answer:
-3,-2,-1,4,5
I really hope this helps you a lot!
Step-by-step explanation:
Answer:
-3,-2,-1,4,5..
Step-by-step explanation:
janh xD I urself ds
URGENT! HELP ME I WILL MARK YOU BRAINLIEST !!!!
pleasee fasterr !!!!!
Answer:
C.................is the answer
Answer:
a)=10m
b)(x+1)
c)=(27x+9)
d=(3x+1)
(PLEASE HELP ASAP PLEASE EXPLAIN ALSO PLEASE AND THANK YOU)
Answer:
Step-by-step explanation:
Positive rational numbers will be in the right side of the number line.
Negative rational numbers will be in the right side of the number line.
18.256 will be lying in between 18.25 and 18.26
Is the following number rational or irrational?
TV4
Choose 1 answer:
A
Rational
В
Irrational
Answer:
B irrational :]..............
"The difference between m and n."
Answer:
Step-by-step explanation:
They are diffrent values
what is 46 divided by 532
Answer:
46 ÷ 532 is 0.08646
hope it's helpful
Answer:
0.08646616541
Step-by-step explanation:
46 ÷ 532 = 0.086466165
hope its helpful
mark me as brainlest
Compare using <, >, or =.
3 7/8 ___ 3 5/6
=
<
>
please explain thank you
Answer:
3 7/8 > 3 5/6
Step-by-step explanation:
i have same question but on edge i tested see if the other answer was right and it was good job and good luck :p
Jonathan has no money and he owes three friends fifteen dollars each. What is his worth?
Answer:
-$45
Step-by-step explanation:
Find how much he owes his friends in total by multiplying 3 by 15:
3(15)
= 45
So, he owes his friends $45.
Since he has no money, we can find his worth by subtracting 45 from 0:
0 - 45
= -45
His worth is -$45.
Robert is buying tickets to a basketball game. Adult tickets cost $4 more than student tickets. He bought 5 adult tickets and 7 student tickets for a total of $104. How much does a student ticket cost?
calculate the length of the legs of an isosceles triangle.The base is less than the other congruent legs by two units.The perimeter of the triangle is 22 meter .
Answer:
Sides = 8 each and base = 6
Step-by-step explanation:
Let congruent legs = x, then the base is x - 2 so,
P = x + x + (x - 2)
22 = 3x - 2
24 = 3x
8 = x (sides)
base = 8 - 2 = 6
At the beginning of March, a store bought a leather couch at a cost of $960.70 and marked it up 20%. At the end of the month, the leather couch had not sold, so the store marked it down 25%. What was the discounted price? Submit
Answer: $864.63
Step-by-step explanation:
First find the original price. Write 20% as the decimal 0.20 before using it in the equation.
price
= cost+mark-up
= 960.70+0.20×960.70
= 960.70+192.14
= 1,152.84
The original price was $1,152.84.
Now find the discount price. Write 25% as the decimal 0.25 before using it in the equation.
discount price
= original price–discount
= 1,152.84–0.25×1,152.84
= 1,152.84–288.21
= 864.63
The discount price was $864.63.
A rectangle has a length of 22 m and a width of 400 cm. What is the perimeter of the rectangle? (Hint: all units must be the same)
Group of answer choices
5,200 cm
1,600 cm
844 cm
3,000 cm
Answer:it's 844
Step-by-step explanation:
When Ms. Perez has excellent service at a restaurant, the amount she leaves for a tip t is at least 20% of the cost of the meal c. Write a model representing the amount of the tip.
Answer:
t ≥ 0.2c
Step-by-step explanation:
Her tip is at least 20% of the cost of the meal, so her tip is greater than or equal to 20% of the cost of the meal
tip ≥ 20% of the cost of the meal
t ≥ 20% of c
Another way of writing "20% of c" is multiplying the two values, so we have
20% of c = 20% * c
t ≥ 20% * c
To convert from a percentage to a decimal, we can divide the percentage by 100. Here, we have
20% = 0.2
t ≥ 0.2 * c
A steel ball has a volume of 1500 cm.
The density of the ball is 95 g/cm'.
Find the mass of the ball in kg.
Answer:
95kg
Step-by-step explanation:
Mass÷Volume=Density
Therefore, Mass = Volume × Density
Mass = 1500 × 95
Mass = 95,000g
Since we were asked to find the mass in kg:
1000g = 1kg
Therefore, 95,000g = 95kg
plz answer it plz
step by step plz
Answer:
answer is subtract the 180-120=80
Answer:
Y = 60[tex]\tt{ \green{P} \orange{s} \red{y} \blue{x} \pink{c} \purple{h} \green{i} e}[/tex]
If angle 1 and angle 2 are vertical angles, and the m<1 = 10x - 9 and m<2 = 4x + 15. Find the value for x.
Answer:
x = 4
Step-by-step explanation:
Vertical angles are equal.
m∠1 = m∠2
10x - 9 = 4x + 15
Add 9 to both sides
10x = 4x + 15 + 9
10x = 4x + 24
Subtract 4x from both sides
10x -4x = 24
6x = 24
Divide both sides by 6
x = 24/6
x = 4
NEED HELP ASAP
giving brainly
Answer:
A&C
Step-by-step explanation:
They are negative and even and they are not positive and even too.
Answer:
A
Step-by-step explanation:
Technically A and C are correct but we are dealing with only negative even values. A non-positive integer is any negative number or zero but we don't have that value so it makes more sense to choose A than C. B is incorrect because a whole number can't include a negative number, a fraction, or a decimal. D is also incorrect because a non-negative integer is a positive number which we don't have in the set.
Best of Luck!