x + y = 5.90
2x + 4y = 16.80

Answers

Answer 1
What are you looking for ?
Answer 2
2+4y(5.90-y)=16.80

We move all terms to the left:

2+4y(5.90-y)-(16.80)=0

We add all the numbers together, and all the variables

4y(-1y+5.9)+2-(16.8)=0

We add all the numbers together, and all the variables

4y(-1y+5.9)-14.8=0

We multiply parentheses

-4y^2+23.6y-14.8=0

a = -4; b = 23.6; c = -14.8;
Δ = b2-4ac
Δ = 23.62-4·(-4)·(-14.8)
Δ = 320.16
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
y1=−b−Δ√2ay2=−b+Δ√2a

y1=−b−Δ√2a=−(23.6)−320.16√2∗−4=−23.6−320.16√−8

y2=−b+Δ√2a=−(23.6)+320.16√2∗−4=−23.6+320.16√−8


Related Questions

what's a word problem for 10x=2

Answers

Answer: Divide each side by '10'. x2 = 9 Simplifying x2 = 9 Take the square root of each side: x = {-3, 3

Step-by-step explanation:

hey can someone double check my work pls​

Answers

Explanation

Here the question wants to find the range of function. Your answer is incorrect because you are confusing between range and domain.

What is domain?

Domain is the set of all x-values. That means any values that are part of x are subset of domain itself. We can find domain two ways which are

Relation methodGraph method

But we are not talking about domain as we are looking for the range of function.

What is range?

Range is the set of all y-values. In the relations or ordered pairs (x, y). Our y is the range. Range can also be called Co-Domain or Output. But of course, we are not talking about finding range using relation method. We are going to find range by looking at the graph.

The range starts from minimum value to maximum value. If there is another point between minimum value and maximum, just ignore it.

Here is a diagram or easier way to understand.

[tex] \boxed{minimum} \Longrightarrow \boxed{maximum}[/tex]

From the graph, our minimum is -5 and our maximum is -1. Notice that there is another opened point at -2 which we are supposed to ignore. Because both minimum and maximum are closed dots. Hence, we use >= or <= only.

Therefore the solution should be

[tex] - 5 \leqslant y \leqslant - 1[/tex]

Answer

[tex] - 5 \leqslant y \leqslant - 1[/tex]

......the correct answer is A

Write an equivalent expression by distributing the "-−" sign outside the parentheses:
-(-1.5q+5r)+2

Answers

Answer:

1.5q - 5r = 2

Step-by-step explanation:

All you need to do here is negate each term inside the brackets, which allows you to get rid of the minus sign and the brackets.

-(-1.5q + 5r) = 2

is exactly the same as saying:

-1 × (-1.5q + 5r) = 2

And if we multiply each term in the brackets by negative one, we get:

(1.5q - 5r) = 2

And now the brackets can go, leaving you with:

1.5q - 5r = 2

Given that ΔABC ∼ΔDEF, m∠A = 108 degrees and m∠E = 40 degrees. Find m∠F. Type ONLY the number of degrees.

Answers

Answer:

∠F = 32°

Step-by-step explanation:

ΔABC & ΔDEF are similar triangles. So, corresponding angles of both triangles are congruent

∠D = ∠A = 108

∠B = ∠E = 40

∠C = ∠F

In ΔDEF,

∠D +∠E + ∠F = 180        {Angle sum property of triangle}

108 + 40 + ∠F = 180

        148 +∠F = 180

                ∠F = 180 - 148

               ∠F = 32°

What is the slope of this line?
Y=-2x+6

Slope=?

Answers

Answer:

-2

Step-by-step explanation:

Fractions less then 1/2

Answers

Answer:

Step-by-step explanation:

16 fractions less than one half

1/9, 2/9, 3/9, 4/9, 1/8, 2/8, 3/8, 1/7, 2/7, 3/7, 1/6, 2/6, 1/5, 2/5, 1/4, 1/3

Answer:

1/3, 1/4, 1/5, 1/6

What is the result when 4x^4+17x^3+10x^2-7x+184x
4
+17x
3
+10x
2
−7x+18 is divided by x+2x+2?

Answers

Answer:

-5x+18/x+2

Step-by-step explanation:

I'm pretty sure it's the answer

Mason throws a coin 3 times.
The outcome of each throw is either Heads or Tails.
List all the possible outcomes of the 3 throws.​

Answers

Given:

Mason throws a coin 3 times.

The outcome of each throw is either Heads or Tails.

To find:

The list of all the possible outcomes of the 3 throws.​

Solution:

Let H represents heads and T represents tails.

For each throw we have 2 choices either H or T.

For three throws the total number of possible outcomes is

[tex]2^3=8[/tex]

Now, list the possible outcomes as shown below.

HHH, HHT, HTH, HTT, THH, THT, TTH, TTT

Therefore, the list of 8 possible outcomes is HHH, HHT, HTH, HTT, THH, THT, TTH, TTT.

Whoever answers I will give brainliest! :)

Using the formula below, solve when s = 3.

1. A = 6s²

Answers

Answer:

54

Step-by-step explanation:

1. A = 6 x 9

A = 54

Hope that helps!

Answer:

heyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy

ok i think this is right

Using the SA formula you'll have to substitute in the edge length for s.

SA = 6(312)²

SA = 584064

The surface area is 584,064 feet²

Write the equation of the line of the line that passes through the point (3, -6) and a slope of 5

Answers

Answer:

y=5x-21

Step-by-step explanation:

Someone help?!.........

Answers

Answer: y = -2x + 16

Explanation:

Use point slope form:

(y1 - y) = m(x1 - x)

y1 = 6 and x1 = 5 and m = -2

6 - y = -2(5 - x)
6 - y = -10 + 2x
-y = 2x - 10 - 6
-y = 2x - 16
y = -2x + 16

simplify the expression (sqrt3+i)(sqrt3-i) and write the result in the form a+bi

Answers

Answer:

4

Step-by-step explanation:

This expression is a difference of squares.

(√3 + i)(√3 - i) = (√3)²-(i)², which is

3 - (-1)

= 3 + 1

= 4

Suppose that 2000 is invented at a rate of 3.5%, compounded semiannually. Assuming that no withdrawals are made, find the total amount after 4 years. Do not round any interminate computations, And round your answer to the nearest cent.

Answers

Answer:

$2,297.76

Step-by-step explanation:

Present value: P = 2000

Future value: F

Annual interest rate: r = 3.5% = 0.035

Time: t = 4 years

Number of compounding periods per year: n = 2

[tex] F = P(1 + \dfrac{r}{n})^{nt} [/tex]

[tex] F = 2000(1 + \dfrac{0.035}{2})^{2 \times 4} [/tex]

[tex] F = 2000(1 + 0.0175)^{8} [/tex]

[tex] F = 2000(1.0175)^{8} [/tex]

[tex] F = 2000(1.148881783) [/tex]

[tex] F = 2297.76 [/tex]

Answer: $2,297.76

Pleas help I’m so confused

Answers

Answer:

Exact form: 7/2

decimal form: 3.5

Nancy has 1/3 of a cup of strawberries. She wants to share them with her 4 friends. How much will each of her friends get?

Answers

Each friend will get 1/12 cup of strawberries because 1/3 divided by 4 equals 1/12

Find the area of the following circle. 6 cm​

Answers

it has to be 113.1.

Solve: x - 9.5 = -10.5

Answers

X= -10.5+9.5
X=1
I hope that helped:)

Answer:

x = -1

Step-by-step explanation:

x - 9.5 = -10.5

x = -10.5 + 9.5

x = -1

The preimeter of the rectangle is 154 feet.The length of the rectangle is 55 feet.What is the width of the rectangle.

Answers

Answer:

22

Step-by-step explanation:

The preimeter is adding all sides together. I took 154-55 twice sense we have four sides of a rectangle and two are lengths. after that i got 44. I then just remembered we had two sides left so divided that by 2 and got 22

Jill sold 478 out of 520 tickets to the opening night of her theater performance. What portion of the tickets did she sell?

Answers

Answer:

write your answer as a decimal, then round

can someone please help me with this i need it badddd

Answers

g=61°, h=9. the opposite angles are equal, and the opposite sides are equal.

Find the area of the shape below giving your answer to 1 decimal place.

Answers

Answer:

198.5 cm²

Step-by-step explanation:

From the figure above we can treat the two semi circles as 1 circle.

Now, the diameter is 10 cm

Thus;

Radius; r = 10/2

r = 5cm

Now, formula for area of a circle is;

A = πr²

Thus;

Area of 2 semi circles = Area of 1 circle = π × 5²

A_circle = 78.54 ≈ 78.5 cm²

When we take out the 2 semi circles, what we have left is a rectangle.

Now, the length of the rectangle will be;

Length; L = 22 - 5 - 5 = 12 cm

*This is because the radius of the semi circle is 5 and distance from the edge of the 22 cm length to the centre of the semi circle is 5 cm

Thus, area of rectangle is given by;

A_rect = LW

W in the image is 10 cm

Thus;

A_rect = 12 × 10

Total area of shape is;

A_total = 120 + 78.5

A_total = 198.5 cm²

Solve 3[-x + (2 x + 1)] = x-1.
X=
DONE

Answers

Answer:

x=−2

Step-by-step explanation:

Simplify both sides of the equation.

3(−x+2x+1)=x−1

Distribute

(3)(−x)+(3)(2x)+(3)(1)=x+−1

−3x+6x+3=x+−1

Combine Like Terms

(−3x+6x)+(3)=x−1

3x+3=x−1

3x+3=x−1

Subtract x from both sides.

3x+3−x=x−1−x

2x+3=−1

Subtract 3 from both sides.

2x+3−3=−1−3

2x=−4

Divide both sides by 2.

2x/2=−4/2

x=-2

I don’t know how to tell if the two pentagons are both are congruent or tell if the sides and angles are congruent

Answers

one of them is 9 and 8. the other is 8 and 8. they are not congruent

To stock your school store, you buy a total of 25 sweatshirts and hats for $172.50. You pay $8.00 per sweatshirt and $2.50 per hat. How many of each item do you buy?

Answers

Answer:

the answer is 20 and 5

Step-by-step explanation:

Number of hats is 5 and the number of sweatshirts is 20

The total number of items bought is 25

The total amount is $172.50

Let a represent the number of sweatshirts

Number of hats is 25-a

Cost of sweatshirt= 8x

Cost of hat= 2.50×(25-x)

= 62.50-2.5x

8x + 62.50 - 2.5x-172.50

8x-2.5x+62.50-172.50

5.5x -110

5.5x= 110

x= 110/5.5

= 20

Number of hats= 25-20, = 5

Number of sweatshirts= 20

Please see the link below for more information

https://brainly.com/question/396501?referrer=searchResults

There are 19 oak trees in a park. Workers will plant more oak trees today. When the workers are finished there will be 56 oak trees in the park. How many oak trees did they plant today?

Answers

Given:

There are 19 oak trees in a park.

There will be 56 oak trees in the park the plantation.

To find:

How many oak trees did they plant today?

Solution:

We have,

Initial number of oak trees = 19

Number of trees after plantation = 56

Now, the number of oak trees they plant today is

New trees = Number of trees after plantation - Initial number of oak trees

                 = 56 - 19

                  = 37

Therefore, they did plant 37 oak trees today.

Use the NET as an aid to compute the surface area.

Answers

I don’t know but if I did I’m sur it would be helpful sorry though

х
у
20
14
1
3
5
2
5
10
Is this relation a function?.

Answers

Answer:

No it is not a relation function if im correct there are two 5 x values so

Step-by-step explanation:

can someone help please?

Answers

Answer:

a. 150 degrees

b. 210 degrees

c. 12π

d. 5π

e. 7π

f. 36π

g. (I'm assuming the shaded region is CAB) 15π

WILL MARK BRAINIEST!Apply the dilation D to the polygon with the given vertices. Name the coordinates of the image points.
D:(X,Y) —> (3x,3y)
J(1,4), K(6,4), L(6,1), M(1,1)

Answers

Option 2 (multiply everything by 3)

I need help on this please ​

Answers

Answer:

maybe rotation.........i think....

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