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3 years ago

Use two numbers below to make a subtraction problem with regrouping.28,33,45,57,39,36

Mathematics

1 answer:

poizon [28]3 years ago

4 0

Answer:

45 - 36 = 9

Step-by-step explanation:

Write 45 down first, move a ten from 40 to 5, subtract 15 - 6 then 30 - 30

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Chubb early on a snack store and is showing Billy Bob how to make some of the items he sells currently he is showing Billy Bob h

vagabundo [1.1K]

$\bf \begin{array}{lccclll}
&\stackrel{lb}{amount}&\stackrel{lb}{price}&\stackrel{total}{price}\\
&------&------&------\\
\textit{plain popcorn}&p&3&3p\\
\textit{caramel popcorn}&c&2.2&2.2c\\
-------&------&------&------\\
mixture&10&2.5&25
\end{array}$

so hmm whatever "p" and "c" are, we know that p + c = 10.

and we also know that 3p + 2.2c = 25

thus

$\bf \begin{cases}
p+c=10\implies \boxed{c}=10-p\\
3p+2.2c=25\\
----------\\
3p+2.2\left(\boxed{10-p} \right)=25
\end{cases}
\\\\\\
3p+22-2.2p=25\implies 3p-2.2p=25-22\implies 0.8p=3
\\\\\\
p=\cfrac{3}{0.8}\implies p=\cfrac{15}{4}\implies p=3.75$

how much will it be needed for caramel popcorn? well, c = 10 - p.

4 0

3 years ago

The equation x^2 + y^2 + 21 = 40 + 18y. What is the radius of this cookie?

trapecia [35]

Answer:

The radius is 10

Step-by-step explanation:

Given

$x^2 + y^2 + 21 = 40 + 18y.$

Required

The radius

Rewrite as:

$x^2 + y^2 - 18y = 40-21$

Subtract 81 from both sides

$x^2 + y^2 - 18y +81= 40-21+81$

Expand

$x^2 + y^2 - 9y - 9y +81= 40-21+81$

Factorize

$x^2 + y( y- 9) - 9(y -9)= 40-21+81$

Factor out y - 9

$x^2 + (y- 9) (y -9)= 40-21+81$

Express as squares

$x^2 + (y- 9)^2= 100$

$x^2 + (y- 9)= 10^2$

The equation of a circle is:

$(x - a)^2 + (y- b)= r^2$

By comparison:

$r^2=10^2$

$r = 10$

6 0

3 years ago

Martina is building a wind chime. She has pieces of metal

Gnesinka [82]

Answer:

IM busy right now

Step-by-step explanation:

3 0

3 years ago

Ariel wants to write 8 entries for her blog. After 2 hours, she has 5 entries left. After 4 hours, she has 2 entries left. Which

mash [69]

Let x be a time in hours and y be an amount of remaining entries. You have that:

At start Ariel wants to write 8 entries for her blog. This means that x=0 and y=8 (0 entries were written). The point with coordinates (0,8) belongs to needed graph.
After 2 hours, she has 5 entries left. This gives you that at x=2, y=5 and graph passes through the point (2,5).
After 4 hours, she has 2 entries left. This gives you that at x=4, y=2 and graph passes through the point (4,2).

Find the slope of the line that is passing through the points $(x_1,y_1)$ and $(x_2,y_2)$ by formula

$\dfrac{y_2-y_1}{x_2-x_1}.$

Thus, the slope is

$\dfrac{5-2}{2-4}=-1.5.$

Answer: graph of line going through (0, 8) with a slope of -1.5

6 0

4 years ago

Read 2 more answers

an investment of Rs 100000 is made which on interest at the rate of 8% per year if the interest is compounded continuously to wh

raketka [301]

Answer:

A = $174,742.21

A = P + I where

P (principal) = $100,000.00

I (interest) = $74,742.21

Step-by-step explanation:

First, convert R as a percent to r as a decimal

r = R/100

r = 8/100

r = 0.08 rate per year,

Then solve the equation for A

A = P(1 + r/n)nt

A = 100,000.00(1 + 0.08/12)(12)(7)

A = 100,000.00(1 + 0.006666667)(84)

A = $174,742.21

Summary:

The total amount accrued, principal plus interest, with compound interest on a principal of $100,000.00 at a rate of 8% per year compounded 12 times per year over 7 years is $174,742.21.

7 0

4 years ago