please do thisss for meee

Answer:

x = -2

y = 10

Step-by-step explanation:

(0.3 + 0.7) x + (0.4 - 0.8) y = 0.8 - 6.8

x - 0.4 y = -6 → x = 0.4 y - 6

0.3 ( 0.4 y - 6) + 0.4 y = 0.8 → 0.12y +0.4y - 1.8 = 0.8

→ 0.52 y = 2.6 → y = 2.6/0.52 = 10

x - 0.4(10) = -6 → x = -2

Step-by-step explanation:

0.3x + 0.4y = 0.8 /×2

0.7x - 0.8y = -6.8

1. 0.6x + 0.8y = 1.6

2. 0.7x - 0.8y = -6.8

1+2 : 1.3x + 0y = -5.2

1.3x = -5.2

x = -5.2÷1.3

x = -4

x -> 1 : 0.6 × -4 + 0.8y = 1.6

-2.4 + 0.8y = 1.6

0.8y = 4

y = 4÷0.8

y = 5

Answer:

16.2

Step-by-step explanation:

15^2+6^2 = 261

square root of that is 16.15549442

Answer:

90cm

Step-by-step explanation:

15^2 + 6^2 = c^2

c^2 = 8100

c = 90

HOPE THIS HELPS!!!

3+8=11

Step-by-step explanation:

3×1=3

y=(1)+3

y=4

3(1)+2(4)=11

so then 3+8=11

Answer:

x=1 and y=4

Step-by-step explanation:

3x+2y=11...........(1)

y=x+3................(2)

Substituting the value of y in equation (1).

3x+2(x+3)=11

3x+2x+6=11

5x=11-6

5x=5

x=5/5=1

x=1

Now, again

Substituting the value of x in equation 2.

y=1+3=4

y=4

Therefore, x=1 and y=4.

Answer:

56 is the answer. I am not sure

Answer:

72?

Step-by-step explanation:

irdk I'm srry if that's wrong

The formula for this is:

Initial amount x multiplier^years

So that is £8000 x 1.028^4 = £8934.33938

That is £8934.34

Answer:

4(2x+2)=8(2-3x)

First I am going to distribute the 4 and the 8 on the sides of the equation.

This gets me to

8x + 8 = 16 - 24x

then subtract 8x on both sides to get

8 = 16 - 16x

then subtract 16 on both sides to isolate the -16x

-8 = -16x

then divide by -16 on both sides, to make the x variable positive and isolate the variable even more.

0.5 = x

Step-by-step explanation:

each step is highlighted in bold, and the equation after the step is shown below the bolded line.

Answer:

2,005

Step-by-step explanation:

Solved it and gotten 2,005.

Answer:

57.6 ft squared

Step-by-step explanation:

diverse 9.6 and 8 to get the number you multiply 5 with. Then you get the side length of the other side. You then multiply both of those numbers together. Hope this helps!! Please mark me as brainliest :)

Answer:

Area of bigger rug = 57.6ft squared

Width of bigger rug = 6ft

Step-by-step explanation:

Because the rugs are similar, we can do 9.6/8 = 1.2

1.2 is our scale factor (the amount we need to times or divide by to find other missing widths or lengths)

To find the area of the rug, we want to do width x length, however the bigger rug doesn't have a width. So, we have to calculate the width.

The width of the smaller rug is 5ft, and we know our scale factor is 1.2, so 5*1.2=6

Therefore, the with of the larger rug is 6ft.

Area = 6*9.6=57.6ft squared

Hope this helps!

Answer:

A

Step-by-step explanation:

on the left of the equation, (6^4)^-5 = 6^-20

the right side you add the exponents so it would be (-7-3) =-10

so it would be 6^-10, which is greater than 6^-20

Answer:

x = 0, y = -3/2

Step-by-step explanation:

Solve the following system:

{-2 y + x = 3 | (equation 1)

{-8 y + 14 x = 12 | (equation 2)

Swap equation 1 with equation 2:

{14 x - 8 y = 12 | (equation 1)

{x - 2 y = 3 | (equation 2)

Subtract 1/14 × (equation 1) from equation 2:

{14 x - 8 y = 12 | (equation 1)

{0 x - (10 y)/7 = 15/7 | (equation 2)

Divide equation 1 by 2:

{7 x - 4 y = 6 | (equation 1)

{0 x - (10 y)/7 = 15/7 | (equation 2)

Multiply equation 2 by 7/5:

{7 x - 4 y = 6 | (equation 1)

{0 x - 2 y = 3 | (equation 2)

Divide equation 2 by -2:

{7 x - 4 y = 6 | (equation 1)

v0 x+y = -3/2 | (equation 2)

Add 4 × (equation 2) to equation 1:

{7 x+0 y = 0 | (equation 1)

{0 x+y = -3/2 | (equation 2)

Divide equation 1 by 7:

{x+0 y = 0 | (equation 1)

{0 x+y = -3/2 | (equation 2)

Collect results:

Answer: x = 0, y = -3/2

Answer:

$9.93

Step-by-step explanation:

Lacey would earn $9.93 in interest

The number of books the school should order is; 1222.2 books

According to the question;

On this note, if the school has a total of 2000 students, it follows that;

By cross product; it follows that;

x = 1222.2 books

Read more on ratios and Proportions;

https://brainly.com/question/13513438

Answer:

5/9

Step-by-step explanation:

2x+[tex]\frac{0.8}{9}[/tex]=1.2

2x=1.2-[tex]\frac{0.8}{9}[/tex]

x=[tex]\frac{1.2-\frac{0.8}{9} }{2}[/tex]

x=5/9

Answer:

$728.00

Step-by-step explanation:

$728.00 I’m assuming. Because the equation should be A(t)= P(1+i) ^t right? Telling us that P= principal, i= interest & t= time.

I’m assuming from MY financial mathematics class.

Answer:

D

Step-by-step explanation:

Consider the line y=x+1. Rotate this 90 degrees, and you get a line with a slope of -1, which obviously cannot be parallel.

Answer:

d; 151 bracelets

Step-by-step explanation:

to find this out we must divide each number of beads by their matching color amounts

1012 / 5 is 202.4 or 202

998 / 6 is 164.6... or 164

1057 / 7 is 151

151 is the least number out of all of these and in this case you can only make 151 bracelets or else you would run out of white

Answer:

40 ft, max height

Step-by-step explanation:

Nick tossed a penny off a 20 foot bridge.

The path of the penny's height can be modeled by the equation h(t) = -16t^2 + 40t + 20.

Find the maximum height of the penny.

:

Find the axis of symmetry, x = -b/(2a); a=-16, b=40

Answer:

4th quadrant

Step-by-step explanation:

Sec in Cartesian form is

[tex] \sec( \alpha ) = \frac{r}{x} [/tex]

In order for sec to be positive, we must have a positive x value so we must be in Quadrant 1 or quadrant 4.

cot is negative so that menas y must be negative so.

The quadrant that has a positive x value and negative y value is 4th quadrant.

Answer:

b 1970s

Step-by-step explanation:

Step-by-step explanation:

Let coordinate of M(x, y)

we know,

image of M(x,y)-------M'(-y,x)

From question

(-y,x)= (-5,-4)

or, -y = -5 and x= -4

So, y=5 and x= -4

Therefore M(x,y)=M(-4,5)

Answer:

Given: △ABC, m∠B=90° AB=12, BC=16, BK ⊥ AC . Find: AC and BK.

Given: △ABC, m∠B=90°

Find: AC and BK.

Short leg 90 degrees Long leg Hypotenuse

AB=12 90 BC=16 AC= ?

AK = ? 90 BK = ? AB=12

AC = SQRT (AB*AB + BC*BC) = 20 [right triangle; Pythagorean Theorem]

Similar triangles:[Note: In diagram, share two angles. Therefore share three angles]

BK / 16 = AB / AC

BK / 16 = 12 / 20

BK = (3/5)16

BK = 48/5

another answer let see this

AB^2+BC^2=AC^2

12^2+16^2=AC^2

144+256=AC^2

400=AC^2

20=AC

# be careful#

ΔABC and ΔBKC are similar triangles, the missing measures are:

If two triangles are similar, their corresponding sides are proportional to each other.

When a segment of a right triangle intersects the hypotenuse, the triangles formed are similar to each other.

Thus, using Pythagorean Theorem:

AC = √(AB² + BC²)

Substitute

AC = √(12² + 16²)

AC = 20 units.

Find BK:

ΔABC ~ ΔBKC (similar right triangles)

Thus:

AB/BK = AC/BC

Substitute

12/Bk = 20/16

Cross multiply

BK = (16 × 12)/20

BK = 9.6

Therefore, ΔABC and ΔBKC are similar triangles, the missing measures are:

AC = 20 units

BK = 9.6 units.

Learn more about similar triangles on:

https://brainly.com/question/11899908

Known of information

Set some variables:

Set up equation based on known information:

    X + 30 = 255

     X = 225

Wilbur's number is 225.

Hope that helps!

The correct statements about the polynomial are as follows;

There are no common variables among all three terms.

The resulting expression when factoring out the GCF is 7(4vw + 7v + 5w).

A polynomial is comprised of variables, exponents, constants, and these can be added, subtracted, multiplied, or divided.

Given

The polynomial 28vw + 49v + 35w.

The polynomial can also be written as;

[tex]\rm 28vw + 49v + 35w\\\\7(4vw + 7v + 5w)[/tex]

The correct statements about the polynomial are as follows;

To know more about polynomial click the link is given below.

https://brainly.com/question/3256580

Answer:

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