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3 years ago

I need these pls!!!!!

Mathematics

1 answer:

Allisa [31]3 years ago

4 0

Answer:

1) $38.40 2) $255. 3) $5.80 4) $3.12

Step-by-step explanation:

So you have to multiply the years by the amount of money you have. Then you multiply that by the percent and divide by 100. (For the last one: because its a month you have to make it a fraction so it was 8/12)

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I need help now pls.

Yakvenalex [24]

Answer:

i cant see your picture, Oh. Use search

Step-by-step explanation:

so good

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2 years ago

Roberto needs 66 cookies and 22 brownies for every 44 plates he makes for a bake sale.

belka [17]

I really dont know i am srry

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3 years ago

Determine the values of k for which the equation has no solution:

Bingel [31]

Let's rewrite the equation as

$|3x+k| = 1-4 = -3$

This should be enough to convince you that the equation has no solutions, no matter which value for k you choose. In fact, the left hand side of the equation is an absolute value, which by definition is always positive, or zero in the worst case.

The equality asks for this quantity to equal -3, a negative number.

A non-negative quantity can never equal a stricktly negative quantity, so the equation has no solutions.

4 0

3 years ago

The square root of the quotient of a number and 6 is 9. What is this number?

VARVARA [1.3K]

First, square both sides of equation so it ends up to be:
a/6=81
so
a=27/2

4 0

4 years ago

Betsy is saying for a bird cage. She saves $1 the first week, $3 the second week, $9 the third week, and so on. All together how

Zigmanuir [339]

Answer:

Betsy will save $121 in 5 weeks.

Step-by-step explanation:

We can see that Betsy's savings are 3 times the saving of her last week. We can see that this is an geometric sequence as 1,3,9,..

To find the sum of our geometric sequence we will use $S_{n}=a\cdot \frac{1-r^{n}}{1-r}$ , where n is number of terms we are taking sum of, a is first term of sequence and r is common ratio of the sequence.

$S_{5}=1\cdot \frac{1-3^{5}}{1-3}$

$S_{5}=\frac{1-243}{-2}$

$S_{n}=\frac{-242}{-2}=121$

Therefore, Betsy will save $121 in 5 weeks.

8 0

3 years ago