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anygoal [31]
3 years ago
14

For brainliest Rob is saving up to buy an mp3 player

Mathematics
1 answer:
nikklg [1K]3 years ago
4 0

Step-by-step explanation:

for 15 =6

75=?(x)

15x=75×6

15x=450

x=450/15

x=30

Rob saved $30

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Solve for x. Enter the solutions from least to greatest. Round to two deical places. (x+8)^2-2=0
arsen [322]

Answer: Isolate the variable by dividing each side by factors that don't contain the variable.

x= -7, -9

8 0
3 years ago
Pls need help with this assignment due soon
djverab [1.8K]

Answer:

Hello!!! Princess Sakura here ^^

Step-by-step explanation:

6a)

62+67=129\\m

6b)

180-152= 28\\28+115=143\\180-143=37\\m

3 0
3 years ago
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What is the value of f(-12) if f(x) = 4x - 12
Cerrena [4.2K]

Answer:

-36

Step-by-step explanation:

Just plug in -12 for x

f(x) = 4 x (-12) -12

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8 0
3 years ago
A soccer field has a perimeter of 326 metres. Its area is 6370 square metres. What are the dimensions of the field?
Burka [1]

Answer:

Step-by-step explanation:

chiều dài:x,x>0

chiều   rộ:y

\left \{ {({x+y)*2=326} \atop {xy=6370}} \right.

\left \{ {{x+y=163} \atop {xy=6370}} \right.

\left \{ {{y=163-x} \atop {xy=6370}} \right.

\left \{ {{y=163-x} \atop {x*(163-x)=6370}} \right.

\left \{ {{y=163-x} \atop {163x-x^{2} =6370}} \right. \\

\left \{ {{y=163-x} \atop {x_{1} =98; x_{2} =65}} \right.

\left \{ {{y=65} \atop {x=98}} \right.

4 0
2 years ago
what is the difference between the commutative distributive and associative properties when multiplying?
Fantom [35]
<span>The associative rule is a rule about when it's safe to move parentheses around. You can remember that because the parentheses determine which expressions you have to do first--which numbers can associate with each other. It looks like this:

For addition: (a + b) + c = a + (b + c)
For multiplication: (ab)c = a(bc)

The commutative property is about which operations you can do backward and forward. You can remember this by thinking of people commuting to work: they go to work every morning, then they repeat the same operation backward when they commute home. It looks like this:

For addition: a + b = b + a
For multiplication: ab = ba

Finally, the distributive property tells you what happens when you distribute one operation against another kind in parentheses. It looks like this:

a * (b + c) = ab + ac

In other words, the a is "distributed" over the b and c.

Of course, you can make these work together:

a * (b + (c + d))
= a * ((b + c) + d) (by the associative property)
= a * (d + (b + c)) (by the commutative property)
= ad + a (b + c) (by the distributive property)
= ad + ab + ac (by the distributive property again).

Hope this helps. </span>
6 0
3 years ago
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