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3 years ago

20 POINTS!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

erastova [34]3 years ago

3 0

Answer:

${ \rm{12300000 = 1.23 \times {10}^{7} }} \\ \\ { \rm{0.000123 = 1.23 \times {10}^{ - 4} }} \\ \\ { \rm{12.300 = 1.23 \times 10 {}^{1} }} \\ \\ { \rm{1230000 = 1.23 \times {10}^{6} }} \\ \\ { \rm{0.00123 = 1.23 \times {10}^{ - 3} }}$

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Jason went to the post office and bought both 41-cent stamps and 26-cent postcards and spent $10.28. The number of stamps was 4

Charra [1.4K]

<h3>Jason bought 20 stamps of $0.41 each and 8 postcards of $0.26 each.</h3>

<em><u>Solution:</u></em>

Let stamps be s and postcards be p

Given that,

The number of stamps was 4 more than twice the number of postcards

s = 4 + 2p -------- eqn 1

Jason bought both 41-cent stamps and 26-cent postcards and spent $10.28

41 cent = $ 0.41

26 cent = $ 0.26

Therefore,

$s \times 0.41 + p \times 0.26 = 10.28$

0.41s + 0.26p = 10.28 --------- eqn 2

Substitute eqn 1 in eqn 2

0.41(4 + 2p) + 0.26p = 10.28

1.64 + 0.82p + 0.26p = 10.28

1.08p = 10.28 - 1.64

1.08p = 8.64

Divide both sides by 1.08

p = 8

Substitute p = 8 in eqn 1

s = 4 + 2(8)

s = 4 + 16

s = 20

Thus Jason bought 20 stamps and 8 post cards

8 0

3 years ago

A park creates new habitats for 182 new monkeys. Each habitat will house 8 or fewer monkeys. What is the least number of habitat

svetlana [45]

182 / 8 = 22.25
you have to round up to account for the .75, so the answer is 23

6 0

2 years ago

Read 2 more answers

Find the equation of the line that passes through the following two points: (3, -7) and (7, 2)

Wittaler [7]

Answer:

$y=\frac{9}{4}x-\frac{55}{4}$

Step-by-step explanation:

Slope-intercept form: y = mx + b

Slope formula: $\frac{y2-y1}{x2-x1}$

Given points: (3, -7), (7, 2)

(3, -7) = (x1, y1)

(7, 2) = (x2, y2)

To write the equation in slope-intercept form, we need to find the slope(m) and the y-intercept(b) of the equation.

First, let's find the slope. To do this, input the given points into the slope formula:

$\frac{2-(-7)}{7-3}$

Simplify:

2 - (-7) = 2 + 7 = 9

7 - 3 = 4

$\frac{9}{4}$

The slope is $\frac{9}{4}$ .

To find the y-intercept, input the slope and one of the given points(in this example I'll use point (7, 2)) into the equation and solve for b:

$2=\frac{9}{4}(7)+b$

$2=\frac{63}{4}+b$

$-\frac{55}{4} =b$

The y-intercept is $-\frac{55}{4}$ .

Now that we know the slope and the y-intercept, we can write the equation:

$y=\frac{9}{4}x-\frac{55}{4}$

6 0

3 years ago

Due at 11:59 PLS HELP

Lelechka [254]

The answer is the last one

8 0

3 years ago

I need help with this assignment. This is the last one for the year so I can get my geometry credit! Thank you to anyone who cho

kirill [66]

Answer:

i can help u just give me the work

Step-by-step explanation:

5 0

3 years ago