Can yall help plz.........................

Answer:

i think x=-1 and y=3. ....

Answer:

x = -1 ,  y = 3

Step-by-step explanation:

2x+5y = 13

-x+4y = 13

Decide whether to add or subtract the two equations by using Different Add Same Subtract (DASS)   or in case below as its SUBTRACT

i apply (SDSS).  

We subtract 5y as this is easier equation either positive prioritises or if both positive then easier number becomes priory.

Results to SDSS  before substituting Y if 5y etc was subtracted

2x+5y = 13             Subtract -5  

2x+5y -5y = 13 -5y  

2x= 13 - 5y             then Divide by 2

2x / 2 = 13/2 - 5y/2          Show then

x = 13 - 5y  / 2  + 4y = 13     Simplify

simplify  13 - 13y  / 2   as   y = 3  

as 13/2 = 6.5 and 2.5 +4 = 6.5

y = 3

Substitute y = 3

13-5y )3) / 2

13-5 (3)  / 2

BODMAS Brackets first Multiplying only for y substitute 5y = 5 x 3

-5 (3) = 15

13-15 = -2

-2/2 = -1

x = -1

halo edwin perkenalkan saya elto saya minta maaf atas kejadian ini disini ada edam yang warna merah era yang orange itu ekut yang ceria ya eria....

hahay

When dividing fractions, you have to multiply by the reciprocal.

Step-by-step explanation:

by punith Reddy

Answer:

149.40625 approximately

Step-by-step explanation:

There isn't really an explanation, you can just use a calculator ;)

Answer:

Step-by-step explanation:

4781/32

without using calculator you can configure this.

AS

32√4781   ║ 149.40625

    -  32  

        1581

      - 128

          301

        - 288      

             1 30                           (put decimal above to add zero in reminder)

          -  128

                200  (one 0 is from decimal and to add another one add 0 abov)

              -192

                   80

                  -64

                    160

                   - 160

                       X  

the graph increases

Step-by-step explanation:

because its moving out

Answer:

y = 4/5 x - 4

Step-by-step explanation:

Answer:X=58

Step-by-step explanation:

Answer:

58

Step-by-step explanation:

Answer:

C.) 1

Step-by-step explanation: Any number raised to the zeroth power will always be 1.

Step-by-step explanation:

Answer:

A: 5 miles

B: 9 mph

Step-by-step explanation:

A:

since the speed is constant, in half an hour, Mike would travel 5 miles.

this is because:  10 miles/1 hour  = 5 miles / 0.5 hours    (multiply top and bottom by 1/2)

B:

[tex]\frac{18 miles}{2 hours}[/tex] = [tex]\frac{9 miles}{1 hour}[/tex] = 9 mph

Answer:

2,4,5

Step-by-step explanation:

Answer is given below

Step-by-step explanation:

given data

average length of all 1015 fishes = 98.06 mm

randomly selects 50 fishes average length = 101.04 mm

solution

Answer:

Pretty sure its 5.

Step-by-step explanation:

AB should represent the space between A and B so i think it would be 5.

Answer:

C. -(5/-4)

Step-by-step explanation:

[tex] - \bigg(\frac{5}{ - 4} \bigg) \\ \\ = \frac{ - 5}{ - ( - 4)} \\ \\ = \frac{ - 5}{4} \\ [/tex]

Answer:

Step-by-step explanation:

8 inches : 3 feet

12 x 3 = 36 inches

8 inches: 36 inches = 2 inches: 9 inches

The ratio in simplest form to express 8 inches over 3 feet is 2:9.

To express the ratio of 8 inches to 3 feet in simplest form, we need to convert the measurements to a common unit.

Since both measurements involve length, we can convert inches to feet or feet to inches.

We know that 1 foot = 12 inches

So 3 feet = 12×3

=36 inches.

Now the ratio 8 inches over 3 feet is equal to 8 inches over 36 inches.

8/36

Divide numerator and denominator by 4:

2/9

Hence, the ratio in simplest form to express 8 inches over 3 feet is 2:9.

To learn more on Ratios click here:

https://brainly.com/question/1504221

#SPJ4

Answer: 27

Step-by-step explanation:

-21 to 6= 27

The difference between the numbers -21 and 6 is 27.

A number line in elementary mathematics is a representation of a graduated straight line that serves as an abstraction for real numbers, represented by the symbol R." It is assumed that every point on a number line corresponds to a real number and that every real number corresponds to a point.

Given that the two numbers are -21 and 6. The distance between the two numbers will be calculated as,

Distance = 6 - ( -21 )

Distance = 6 + 21

Distance = 27

Hence, the difference is 27.

To know more about number lines follow

https://brainly.com/question/24644930

#SPJ2

Answer:

it is!!

Step-by-step explanation:

it terminates after the tenths place, therefore, it can be made into a terminating decimal, which means its rational!! can i maybe get brainliest :D at least a thanks or a rating :D

Answer:

x = 24

Step-by-step explanation:

1/6 x + 3 = 7

1/6 x = 4

x = 24

Step-by-step explanation:

The expression is 1/6x+3=7

1/6x+3=7

First, you subtract 3 from both sides

1/6x=4

Then you divide 1/6 from both sides

Dividing fractions is confusing, so I will show you how to do it

4/1 / 1/6

Because you can't divide 1 by 6, you KCF, or keep change flip.

You keep the 4/1, you change the operation to multiplication, and flip 1/6 to make it 6/1.

Now the problem is 4x6=24

So x=24

Step-by-step explanation:

DG+GM=DM

r+2+2r-13=25

combine like terms

3r-11=25

3r=36

r=12

The integral can be evaluated by substituting everything you know:

[tex]\displaystyle\int_C\mathbf F\cdot\mathrm d\mathbf r=\int_C\mathbf F(x(t),y(t),z(t))\cdot\dfrac{\mathrm d\mathbf r}{\mathrm dt}\,\mathrm dt[/tex]

[tex]=\displaystyle\int_0^1(t^3\,\mathbf i+t^5\,\mathbf j+t^4\,\mathbf k)\cdot(\mathbf i+2t\,\mathbf j+3t^2\,\mathbf k)\,\mathrm dt[/tex]

[tex]=\displaystyle\int_0^1(t^3+5t^6)\,\mathrm dt[/tex]

[tex]=\dfrac{t^4}4+\dfrac{5t^7}7\bigg|_0^1=\dfrac14+\dfrac57=\boxed{\dfrac{27}{28}}[/tex]

The line integral ∫F · dr along the curve is 9/10.

To evaluate the line integral ∫F · dr along the curve C, where F(x, y, z) = xyi + yzj + zxk and C is the twisted cubic given by x = t, y = t², z = t³ for 0 ≤ t ≤ 1, we need to parameterize the curve C and compute the dot product between F and the tangent vector dr.

The parameterization of C is:

r(t) = ti + t²j + t³k

To compute dr, we take the derivative of r(t) with respect to t:

dr = (dx/dt)i + (dy/dt)j + (dz/dt)k

dr = i + 2tj + 3t²k

Now we can compute the dot product between F and dr:

F · dr = (xy)(dx/dt) + (yz)(dy/dt) + (zx)(dz/dt)

F · dr = (t)(i) + (t²)(2t)(j) + (t)(t³)(3t²)(k)

F · dr = ti + 2t³j + 3t⁴k

To evaluate the line integral, we integrate F · dr with respect to t over the interval [0, 1]:

∫[0,1] F · dr = ∫[0,1] (ti + 2t³j + 3t⁴k) dt

Integrating each component separately:

∫[0,1] ti dt = (1/2)t² ∣[0,1] = (1/2)(1)² - (1/2)(0)² = 1/2

∫[0,1] 2t³j dt = (1/4)t⁴ ∣[0,1] = (1/4)(1)⁴ - (1/4)(0)⁴ = 1/4

∫[0,1] 3t⁴k dt = (1/5)t⁵ ∣[0,1] = (1/5)(1)⁵ - (1/5)(0)⁵ = 1/5

Adding the results together:

∫[0,1] F · dr = (1/2) + (1/4) + (1/5) = 5/10 + 2/10 + 2/10 = 9/10

Learn more about line integral here:

brainly.com/question/29850528

#SPJ2

Answer: 6x6 =36

Step-by-step explanation:

Sorry if it's wrong, but should be right cause it makes sense.

Answer:

-18.75 is a rational number. A rational number is any number that has either a repeating decimal or one that ends. It doesn’t no go on, so it is considered rational. Hopefully this helps! Feel free to mark brainliest!

-18.75 is a rational number

Rational numbers are numbers that can be expressed as the fractions of two integers

That is, R is a rational number if it can be expression as:

R  =  p/q

where p and q are integers

-18.75 can be expressed as -1875/100 where both -1875 and 1000 are integers.

Since -18.75 can be expressed as the fraction of two integers, it is a rational number.

Learn more here: https://brainly.com/question/17471044

Answer/Step-by-step explanation:

To represent the data given on a stem and leaf plot, the whole number in a given value would be used as the stem, while the number after the decimal point is the leaf. (Key: 3|3 = 3.3).

For example, in the first stem in the first row, we have 4 as the stem. All values that starts with 4 point would be represented in this row. The digit after 4 point for each of the values would be written on the leaf column in the first row, from the least to the largest. For the first row we have: 4 | 3 9.

Same applies to the rest rows.

The stem plot would look like the one below:

Ice Thickness:

Stem | Leaf

4 | 3 9

5 | 1 8 8 8 9

6 | 5 8 9 9

7 | 0 2 2 2 2 5 9

8 | 0 7

The data of the stem-and-leaf plot shows a bell-shaped pattern with majority of the ice thickness for the 20 locations clustering around the center of the data distribution.

Answer:

a. What is the approximate percentage of women with platelet counts within 1 standard deviation of the mean, or

between 191.1 and 315.7?

68%

b. What is the approximate percentage of women with platelet counts between 128.8 and 378.0?

95%

Step-by-step explanation:

The Empirical rule formula states that:

1) 68% of data falls within 1 standard deviation from the mean - that means between μ - σ and μ + σ .

2) 95% of data falls within 2 standard deviations from the mean - between μ – 2σ and μ + 2σ .

a. What is the approximate percentage of women with platelet counts within 1 standard deviation of the mean, or

between 191.1 and 315.7?

μ = mean = 253.4

σ = standard deviation = 62.3.

μ - σ

= 253.4 - 62.3

= 191.1

μ + σ

= 253.4 + 62.3

= 315.7

Therefore, the first empirical rule holds for Question a. This states that 68% of data falls within 1 standard deviation from the mean - that means between μ - σ and μ + σ .

Therefore, the approximate percentage of women with platelet counts between 191.1 and 315.7 is 68%

b. What is the approximate percentage of women with platelet counts between 128.8 and 378.0?

μ = mean = 253.4

σ = standard deviation = 62.3.

Applying the second rule of the empirical rule: this states that: 95% of data falls within 2 standard deviations from the mean - between μ – 2σ and μ + 2σ .

For x = 128.8

μ - 2σ

= 253.4 - 2 × 62.3

= 128.8

μ + 2σ

= 253.4 + 2 × 62.3

= 378

Therefore, the approximate percentage of women with platelet counts between 128.8 and 378.0 is 95%

Answer:

[tex] - 18 \\ - 13 \\ 12 \\ 22 \\ 27[/tex]

Step-by-step explanation:

just replace the x by the number given, it's simple calculation

Answer:

30=-4

Step-by-step explanation:

Simplifying

6(5 + -2v) = -4(3v + 1)

(5 * 6 + -2v * 6) = -4(3v + 1)

(30 + -12v) = -4(3v + 1)

Reorder the terms:

30 + -12v = -4(1 + 3v)

30 + -12v = (1 * -4 + 3v * -4)

30 + -12v = (-4 + -12v)

Add '12v' to each side of the equation.

30 + -12v + 12v = -4 + -12v + 12v

Combine like terms: -12v + 12v = 0

30 + 0 = -4 + -12v + 12v

30 = -4 + -12v + 12v

Combine like terms: -12v + 12v = 0

30 = -4 + 0

30 = -4

Answer:

C. 37.5

Step-by-step explanation:

10 10 + 20 + 35 + 35 + 35 + 40 + 45 + 45 + 60 + 50=375

375÷10=37.5

The mean of the given data set 10, 20, 35, 35, 35, 40, 45, 45, 50, 60 is 37.5 so option (C) will be correct.

The mean is the average of a data set. Mean gives us the idea of that how much amount of overall data have.

In other words, the mean is the foundation of the deviation of data from all data sets.

Mean = sum of data / Number of data

For example, if you have marks in 5 subjects like 40,45,44,46,48 then the mean will be

( 40 + 45+ 44 + 46 + 48) /5 = 44.6.

Given the data set,

10, 20, 35, 35, 35, 40, 45, 45, 50, 60

Now mean is given as

Mean = sum of data / Number of data

So,

Mean = (10+20+35+35+35+40+45+45+50+60)/10

Mean = 37.5

Hence "The mean of the given data set 10, 20, 35, 35, 35, 40, 45, 45, 50, 60 is 37.5".

For more about the mean,

https://brainly.com/question/17060266

#SPJ2

Answer:

Step-by-step explanation:

2n + 8.5 = 23

2n = 14.5

2n = 7.25 or 7 1/4 feet

Answer:

Hannah is taller because her z-score is higher than Kylie’s z-score.

Step-by-step explanation:

Answer:

4+is the absolute value is greater than 3