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3 years ago

I need your help pls

Mathematics

1 answer:

Zielflug [23.3K]3 years ago

8 0

Answer:

1. Let the number is x

a) 8 more than 4 times a number is 28

Required equation:

4x + 8 = 28

b) Example would be:

Four teams of same number of members joined together and the team of eight joined them adding up to 28 people.

Height - h, length - l

h = 1/3l
h = 5 feet, l = ?

----

l = 3h
l = 3*5 = 15 feet

Equation:

6a - 16 = b

Example situation:

6 packs of each containing a number of items. It was reduced by 16 (sold) and b number of items left in the stock.

Note. You need to add your details to the examples.

You might be interested in

A closed cylindrical can of fixed volume V has radius r.a) Find the surface area, S, as a function of r.b) What happens to the v

andrey2020 [161]

Answer:

Step-by-step explanation:

This question is incomplete; here is the complete question.

A closed cylindrical can of fixed volume V has radius r. (a) Find the surface area, S, as a function of r. (b) What happens to the value of S approaches to infinity? (c) Sketch a graph of S against r, if V=10 cm³.

A closed cylindrical can of volume V is having radius r and height h.

a). Surface area of a cylinder is given by

S = 2(Area of the circular sides) + Lateral area of the can

S = 2πr² + 2πrh

S = 2πr(r + h)

b). Since surface area is directly proportional to radius of the can

S ∝ r

Therefore, when r approaches to infinity (r → ∞)

c). If V = 10 cm³ Then we have to graph S against r.

From the formula V = πr²h

10 = πr²h

h = $\frac{10}{\pi r^{2}}$

By placing the value of h in the formula of surface area,

S = $2\pi r(r+\frac{10}{\pi r^{2}})$

Now we can get the points to plot the graph,

r -2 -1 0 1 2

S -13.72 -13.72 0 26.28 35.13

7 0

3 years ago

In spring 2014, faculty from the City University of New York (CUNY) reported on a randomized controlled trial they conducted. Th

Tems11 [23]

Answer:

Explanatory variable: Extra support by faculties

Response variable: whether community college students who have assess into elementary algebra could be successful if they were placed directly into college-level statistics.

Confounding Variable: Ability of students to get passing grades.

It is an experiment to check if the hypothesis is true.

Step-by-step explanation:

An explanatory variable is a type of independent variable. An explanatory variable is that variable that explains changes in another variable. It can be anything that might affect the response variable. The explanatory variable is used to predict or explain differences in the response variable. In an experimental or research study, the explanatory variable is the variable that is manipulated by the researcher.

From the information given,

Explanatory variable: Extra support by faculties.

The response variable is also known as the dependent/outcome variable. Here, its value can be predicted or its variation can be explained by the explanatory variable. In an experimental study, this is the outcome that is measured after manipulation of the explanatory variable

From the question above,

Response variable: whether community college students who have assess into elementary algebra could be successful if they were placed directly into college-level statistics.

A confounding variable is that outside influence that changes the effect of a dependent and independent variable. This extraneous influence is often used to influence the outcome of an experimental design. The Confounding Variable in the above is:

Confounding Variable: Ability of students to get passing grades.

It is an experiment to check if the hypothesis is true.

6 0

3 years ago

14 points :) Please answer fast! ;D

vova2212 [387]

Answer:

$x=2y+4$

Step-by-step explanation:

Let

x ------> the number of dogs Larry walked

y -----> the number of dogs Kyle walked

we know that

The linear equation that represent this scenario is equal to

$x=2y+4$

4 0

3 years ago

Simplify: (a4 - 6a + 5) - (a4 - 3a + 2a2 - 6)

Galina-37 [17]

(a4-6a+5)-(a4-3a+4a-6)
by expressing like term
a4-a4=0
-6a-(-3a+4a)=-5a
5-(-6)=11
:we have-5a+11

7 0

3 years ago

Write an expression that can be used to multiply 6x198 mentally

Black_prince [1.1K]

6(100+90+8) is the equation
6x100 =600
6x90 =540
6x8 = 48
1,188 is the answer

7 0

3 years ago

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