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4 years ago

Asha and Lucy are selling pencils in a school shop.

Mathematics

1 answer:

Akimi4 [234]4 years ago

8 0

Step-by-step explanation:

7x+22=2(5x+2)

7x+22=10x+4 (-7x)

3x+4=22 (-4)

3X=18 (divide by 3)

X=6 pencils

check if the number is correct

asha= 7*6=42 42+22 is 64

Lucy= 5*6=30 30+2 is 3264/32 is 2

asha= 7*6=42 42+22 is 64Lucy= 5*6=30 30+2 is 3264/32 is 2there fore asha sells twice as many as Lucy

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A shop owner increases some prices by 50%.

Dahasolnce [82]

1.5 is correct answer

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3 years ago

Which equation represents the formula for the general term, gn, of the geometric sequence 3, 1, 1/3, 1/9, . . .?

dedylja [7]

Answer:

Explicit form: $g_n=3(\frac{1}{3})^{n-1}$

Recursive form: $g_n=\frac{1}{3}g_{n-1}$ with $g_1=3$ .

Step-by-step explanation:

The first term is 3 and we are dividing by 3 each time.

Another way to say we are dividing by 3 each time is to say we are multiplying by factors of 1/3.

If the first term is $a$ and $r$ is the common ratio then the geometric sequence in explicit form is:

$a_n=a(r)^{n-1}$

$g_n=3(\frac{1}{3})^{n-1}$

The recursive form for a geometric sequence is $a_n=ra_{n-1}$ with $a_1=a$ where $r$ is the common ratio and $a$ is the first term.

So the recursive form for our sequence is $g_n=\frac{1}{3}g_{n-1}$ with $g_1=3$ .

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3 years ago

What is 67,235 written as a number name

BaLLatris [955]

Answer:

sixty seven thousand two hundred thirty five

5 0

3 years ago

Read 2 more answers

(3, 2) and 3-2) Find the slope of the line through each pair

goldenfox [79]

Answer:

m = undef

General Formulas and Concepts:

Order of Operations: BPEMDAS
Slope Formula: $m=\frac{y_2-y_1}{x_2-x_1}$

Step-by-step explanation:

Step 1: Define

Point (3, 2)

Point (3, -2)

Step 2: Find slope m

Substitute: $m=\frac{-2-2}{3-3}$
Subtract: $m=\frac{-4}{0}$
Simplify: m = undef

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3 years ago

Evaluate the expression using the given value of the variable. 4 – 2x + 5x when x = 4 16 –24 –18 28

Snowcat [4.5K]

Answer:

A) 16

Step-by-step explanation:

The question is:

Evaluate the expression using the given value of the variable.

$4-2x+5x$ when $x = 4$

A) 16

B) -24

C) -18

D) 28

Solution:

Given expression:

$4-2x +5x$

Plugging in $x = 4$ in the expression

⇒ $4-2(4)+5(4)$

⇒ $4-8+20$

⇒ $16$

So the expression evaluates to 16 when we put $x = 4$

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3 years ago