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2 years ago

Hello please help today is my birthday *

Mathematics

1 answer:

Rama09 [41]2 years ago

5 0

b. the range of the function is the set of all real numbers greater than 0.

that is false hope that helps

happy birthday

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in one day in, Annie traveled five times the sum of the number of hours Brian traveled and 2. together the travel 20 hours. find

svlad2 [7]

5B + B = 20

6B = 20

B = 20 / 6

= 10/ 3 hrs

A = 5 ( 10/3 + 2)

= 5 (16/3)

= 80 / 3 hrs

Brian traveled 10/3 hours and Annie traveled 80/3 hours.

3 0

3 years ago

What is negative five plus negative four bracketed

Brrunno [24]

-5+(-4)

-5-4

-9

Therefore, -9 is the correct answer

8 0

2 years ago

Solve for x 35+.8x=43-7x

Vinvika [58]

Answer:

x = 1.02564

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Multiplication Property of Equality
Division Property of Equality
Addition Property of Equality
Subtraction Property of Equality

Algebra I

Terms/Coefficients

Step-by-step explanation:

Step 1: Define

35 + 0.8x = 43 - 7x

Step 2: Solve for x

[Addition Property of Equality] Add 7x on both sides: 35 + 7.8x = 43
[Subtraction Property of Equality] Subtract 35 on both sides: 7.8x = 8
[Division Property of Equality] Divide 7.8 on both sides: x = 1.02564

7 0

3 years ago

A line passes through the two given points. Is it vertical, horizontal, or neither?

vova2212 [387]

To answer this question, let us find the slope using the coordinates:

(2, 1) and (3, 4)

1 - 4 / 2 - 3
-3 / -1
3

The slope is 3, so the answer is neither, since a horizontal line has a slope of 0 and the slope of a vertical line is undefined.

6 0

3 years ago

A system of linear equations is shown below, where A and B are real numbers. 3x + 4y = A Bx – 6y = 15 What values could A and B

eduard

ANSWER

The equation has no solution if

$A=6$ and $B=-4.5$ .

EXPLANATION

The first equation is

$3x+4y=A--(1)$

and the second equation is

$Bx-6y=15--(2)$

We try solving this equation for B using the method of elimination.

We multiply equation (2) by 3 to obtain;

$3Bx-18y=45--(3)$

We also multiply equation (1) by B to obtain;

$3Bx+4By=AB---(4)$

We now subtract equation (3) from equation (4).

This will give us;

$4By+18y=AB-45$

We factor $y$ on the right hand side to get;

$(4B+18)y=AB-45$

We solve for y to obtain;

$y=\frac{AB-45}{4B+18}$

The above equation is defined for all real values except

$4B+18=0$

This implies that

$B=-\frac{18}{4}$

$B=-4.5$

Remember that the system will have no solution if and only if the denominator is zero and the numerator is not equal to zero.

This means that,

$AB-45\ne 0$

$\Rightarrow AB\ne 45$

When we substitute $B=-4.5$ , then we will have

$-4.5A\ne 45$

$\Rightarrow A\ne -\frac{45}{4.5}$

$\Rightarrow A\ne -10$

Hence the correct answer is option A

Note however that if both the numerator and denominator equal zero, then the system has infinitely many solutions.

6 0

3 years ago

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