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4 years ago

Joan has 294 black marbles. Joan has 42 times more black marbles than Dan. How many black marbles does Joan has?

Mathematics

1 answer:

lara [203]4 years ago

5 0

Joan has 294 marbles
dan has 7 marbles

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Someone help me answer all of these <br> i need them asap because i have a 2 in this class

Diano4ka-milaya [45]

Answer:

ur mon

Step-by-step explanation:

6 0

3 years ago

Find the determinant of the given matrix.<br><br> -42<br> or<br> -22<br> or <br> 22<br> or <br> 42

Maksim231197 [3]

Answer:

-42

Step-by-step explanation:

Cross multiply

5 * -2 = -10

8 * 4 = 32

-10 - 32 = -42

5 0

3 years ago

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What is 49,010,000 in scientific notation

jolli1 [7]

The number in scientific notation is 4.901 * 10^7

<h3>How to express the number in scientific notation?</h3>

The number is given as:

Number = 49,010,000

A number in scientific notation is represented as:

a * 10^b

Where a is any number between 1 and 10.

So, we have:

Number = 4.901 * 10^7

Hence, the number in scientific notation is 4.901 * 10^7

Read more about scientific notation at:

brainly.com/question/5756316

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4 0

2 years ago

The arithmetic sequence a_ia i a, start subscript, i, end subscript is defined by the formula: a_1 = 15a 1 =15a, start subsc

daser333 [38]

Answer:

-1,512,390

Step-by-step explanation:

Given

a1 = 15

$a_i = a_{i-1} -7$

Let us generate the first three terms of the sequence

$a_2 = a_{2-1}-7\\a_2 = a_1 - 7\\a_2 = 15-7\\a_2 = 8$

For $a_3$

$a_3 = a_{3-1}-7\\a_3 = a_2 - 7\\a_3 = 8-7\\a_3 = 1$

Hence the first three terms ae 15, 8, 1...

This sequence forms an arithmetic progression with;

first term a = 15

common difference d = 8 - 15 = - -8 = -7

n is the number of terms = 660 (since we are looking for the sum of the first 660 terms)

Using the formula;

$S_n = \frac{n}{2}[2a + (n-1)d]\\$

Substitute the given values;

$S_{660} = \frac{660}{2}[2(15) + (660-1)(-7)]\\S_{660} = 330[30 + (659)(-7)]\\S_{660} = 330[30 -4613]\\S_{660} = 330[-4583]\\S_{660} = -1,512,390$

Hence the sum of the first 660 terms of the sequence is -1,512,390

6 0

3 years ago

a shopkeeper bought a pair of shoes at sh 480 he wished to make a profit of 30 percent after selling what was his marked price

tangare [24]

Answer:

624

Step-by-step

480+(480(30%))

=624

3 0

2 years ago

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