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Lera25 [3.4K]
2 years ago
10

40% of attendees at Martika's wedding order

Mathematics
1 answer:
Harrizon [31]2 years ago
6 0

Answer:

400 people

Step-by-step explanation:

equation: 40/100 = 160/x

cross multiply: 40 * x = 100 * 160

multiply: 40x = 16000

divide each side by 40: x = 400

there is 400 people

I hope this helped, please mark Brainliest, thank you !!

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Which of the following equations best represents the regression line for the data given in the
True [87]

The regression equation for the data given is y= -8.57 -2.31x

Step-by-step explanation:

The first step is to form a table as shown below;

x           y          xy         x²         y²

1            4           4          1          16

2            1            2          4         1

3            5          15         9         25

4             10         40        16       100

5             16         80        25      256

6              19        114       36        361

7               15       105       49       225

28             60       360      140     984  ------sum

A linear regression equation is in the form of y=A+Bx

where ;

x=independent variable

y=dependent variable

n=sample size/number of data points

A and B are constants that describe the y-intercept and the slope of the line

Calculating the constants;

A=(∑y)(∑x²) - (∑x)(∑xy) / n(∑x²) - (∑x)²

A=(60)(140) - (28)(360)  / 7(140)-(28)²

A=8400 - 10080 /980-784

A= -1680/196

A= - 8.57

B= n(∑xy) - (∑x) (∑y) / n(∑x²) - (∑x)²

B= 7(360)-(28)(60) / 7(60) - (28)²

B=2520 - 1680 /420-784

B=840/-364

B= -2.31

y=A+Bx

y= -8.57 -2.31x

Learn More

Regression equation :brainly.com/question/12280902

Keywords : equations, regression line, data

#LearnwithBrainly

7 0
3 years ago
State the restrictions on the domain.
mihalych1998 [28]

we know that, denominator ≠ 0

16y² ≠ 0

y ≠ 0 is excluded value.

8 0
2 years ago
Una pared rectangular tiene un perímetro de 48 metros. El largo de la pared es el doble del ancho. ¿Cuántos metros cuadrados de
AveGali [126]
Datos:
Perímetro = 48m
Ancho = x
Largo = 2x
Área = (2x)(x)

Ecuación:
2x + 4x = 48
6x = 48
x = 48/6
x = 8

Sustitución:
Área = [2(8)](8)
Área = (16)(8)
Área = 128

Respuesta: Se necesitarán 128 metros cuadrados de papel decorativo
4 0
2 years ago
Which expression is equivalent to 4 square root 3^3 <br> A 3 3/4<br> B 3 4/3<br> C 4^1<br> D 4^3
posledela
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2 years ago
I SWEAR PLS SOMEONE HELP ME W THIS
stepladder [879]

Answer:

m = 4/1 (4)

b = -5

equation = y = 4x-5

3 0
2 years ago
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