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maks197457 [2]
3 years ago
13

Solve the equation -7 (8a - 9 = - 23 + 4a

Mathematics
1 answer:
lapo4ka [179]3 years ago
8 0

Answer:

a= 1.5

Step-by-step explanation:

distrubutive property:

-7(8a) - 7(9) = -23 +4a

-56a - 63 = -23 + 4a

+63 +63

-56a = 40 + 4a

-4a -4a

-60a=40

a= -1.5

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Lucy earns money each week for her allowance. Analyze the graph. How many weeks will it take for her to earn $120? if she gets $
Eddi Din [679]

Answer:

12 weeks because 12weeks*$10 is $120 total.

Step-by-step explanation:

you didn't post a pic of the graph so this is my best guess.

7 0
3 years ago
The events committee buys 80 flowers for a school dance. The flowers are a combination of carnations and roses. Each carnation c
Slav-nsk [51]

Answer:

64 carnations and 16 roses.

Step-by-step explanation:

The events committee buys 80 flowers

The flowers are a combination of carnations and roses.

Each carnation costs $0.50 and each rose costs $2.50

The committee spends a total of $72

<u>Solution:</u>

<u />

Let there be  (c) carnations and (r) roses.

So,

c + r = 80 flowers

and $0.50c + $2.50 = $72

This forms a simultaneous equation:

c + r = 80 ... (i)

0.5c + 2.5r = 72 ... (ii)

Multiplying equation (i) by 0.5 and equation (ii) by 1 gives;

0.5c + 0.5r = 40 ... (i)

0.5c + 2.5r = 72 ... (ii)

Subtracting (i)  from (ii) gives;

0c + 2r = 32

2r = 32

r = 32 ÷ 2 = 16

Therefore, there are 16 roses

and 80 - 16 = 64 carnations

7 0
3 years ago
You ask your friend which U.S. states have the greatest population densities. Your friend says it must be California and Texas b
Brilliant_brown [7]
"<span>-No, because California and Texas also have two of the greatest areas, so they may not have the greatest population densities." 

This is correct as the states such as New Jersey may not have as large as a population as Texas and California but, have a significantly less land than those states. Population density refers to people per km squared, which takes both land and population into account.

Hope this helps!
-Benjamin</span>
6 0
3 years ago
A line passes through $A(1,1)$ and $B(100,1000)$. How many other points with integer coordinates are on the line and strictly be
jonny [76]

Answer:

98

Step-by-step explanation:

Integers are whole numbers or opposite of whole numbers.

The slope is 1.

How?

Change of y is 100-1=99.

Change of x is 100-1=99.

The slope is 99/99=1 or 1/1.

So if we start at (1,1) and we rise 1 and run 1 right, we get (2,2).

If we do that again from (2,2) we get (3,3).

Following the pattern of going up 1 and right from each new location discovered we get all the of these points:

Start (1,1)

(2,2)

(3,3)

(4,4)

(5,5)

(6,6)

....

(96,96)

(97,97)

(98,98)

(99,99)

end (100,100)

So we just need to count all the numbers from 2 to 99.

99-2+1

97+1

98

7 0
2 years ago
A ball is released at a height of 16 inches to roll inside a half-cylinder. It rolls to a height of 8 inches on the other side o
Kisachek [45]

Answer: \frac{1}{2} inch

Step-by-step explanation: half in is the answer your probably looking for in APEX.

8 0
3 years ago
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