MATHEMATICS HIGH SCHOOL

7) 2.1x + 45.2 = 3.2 -8.4x

Answers

Answer 1

Answer:

Answer:

x=-4

Step-by-step explanation:

brainliest please

Answer 2

Answer:

Answer:

x=-4, Give brainliest please

Step-by-step explanation:

Step 1: Add 8.4x to both sides.

2.1x+45.2 = -8.4x +3.2

+8.4x +8.4x

10.5x+45.2=3.2

Step 2: Subtract 45.2 from both sides.

10.5x + 45.2 = 3.2

-45.2 -45.2

10.5x=−42

Step 3: Divide both sides by 10.5.

$(10.5x)/(10\n)$ = $(-42)/(10)$

x=−4

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I don't get this question

On a spinner:
P(3) = 3/8 and the p(4) = 1/3
what is the probability of getting a 3 or 4

Answers

add the probabilities
3/8+1/3=9/24+8/24=17/24

p= 1/8 and p=1/12. those are the two probabilities

Which of the following is a solution to the quadratic equation below? x^2+x-56=0

a.2
b.-55
c.-8
d.28

Answers

There are two solutions to that quadratic quation: -8 and 7, but as there is only one in answers, you need to pick C.

you can use the expression 5n to determine the amount of money you have in cents, when you have n nickels. Find the amount of money you have, in cents, when you have 18 nickels

Answers

Answer:

90 cents

Step-by-step explanation:

Find how much money you have by plugging in 18 as n into the expression:

5(18)

Multiply:

= 90

So, when you have 18 nickels, you have 90 cents

Which expression can be used to convert 22 Australian dollars to US dollars?Assume 1.2 Australian dollars equals 1 US dollar.

Answers

Answer:

Expression used to convert 22 Australian Dollar to US Dollar is $(22)/(1.2)$

Step-by-step explanation:

Given:

22 Australian Dollars.

To Do: Expression which can be used to convert Australian dollar to Us dollar.

Let, x be the number of Australian Dollars and y be the US Dollars.

We know that 1.2 Australian Dollar equal to 1 US Dollar.

⇒ 1 Australian Dollar = $(1)/(1.2)$ US Dollar

So, x Australian Dollar = $(1)/(1.2)* x\:=\:(x)/(1.2)$ US Dollar

Thus, Expression that can be used to convert Australian Dollar into US Dollar is given by,

$y=(x)/(1.2)$

So. 22 Australian Dollar

put x = 22

$y=(22)/(1.2)=18.3$ US Dollars

Therefore, Expression used to convert 22 Australian Dollar to US Dollar is $(22)/(1.2)$

1.2(22)=x
x= US Dollar amount of 22 Australian dollars.

The number of possible different 12-letter arrangements of the letters in the word “TRIGONOMETRY” is represented by

Answers

We will use formula for Permutations with repetition:
P(n, m1,m2,m3) = n! / m1! · m2! · m3!
In the word TRIGONOMETRY we have repetitions of letters: T, R and O.
P= $(12!)/(2!*2!*2!)= (12*11*10*9*8*7*6*5*4*3*2*1)/(2*1*2*1*2*1) =$ = 59,875,200

Is it possible for an x-intercept and a y-intercept to have no intercept

Answers

Not all functions will have intercepts

Yes it is called parallel or undifined

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