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iris [78.8K]
3 years ago
7

2a is any number a multiplied by the number 2. Calculate the value of 2a for a = 7.

Mathematics
1 answer:
marshall27 [118]3 years ago
3 0

Answer:

14

Step-by-step explanation:

step 1.

substitute 'a' with 7

You are then left with a multiplication problem.

step 2.

solve 2 × 7

answer is 14

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One integer is 8​ times another. if the product of the two integers is 288, then find the integers.
Anarel [89]
One integer is x
another integer is y

x=8y
xy=288

(8y)(y)=288
8y^2=288
Divide both sides by 8
y^2= 36
The square root of 36 is 6
y=6

x=8y = 8(6) = 48
x=48
7 0
3 years ago
Students water a plant with the same amount of water for 28 days, if the students use a total of 23.8 L of water over the 28 day
DENIUS [597]
23.8÷28=0.85
0.85 Liters

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2) Zack ran 6 miles this weekend. How many feet did Zack run over the weekend?​
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7 0
3 years ago
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5 0
3 years ago
Read 2 more answers
In a pen of goats and chickens, there are 40 heads and 150 feet. How many goats and chickens are in the pen?
s2008m [1.1K]

Hey there!!

A chicken has 1 head and 2 feet . A goat has 1 head and 4 feet

For heads, total = 40

Let us take the number of chickens as ' x ' and goats as ' y '

x + y = 40 ------------- ( 1 )

2x + 4y = 150 ----------- ( 2 )

Multiply the first equation with 2

2x + 2y = 80

2x + 4y = 150

Subtract the first equation from the first

2y = 70

y = 35

Number of goats = 35

substitute this in other equation

x + y = 40

x + 35 = 40

x = 5

Number of chickens are 4

Hope it helps!

6 0
3 years ago
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