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frozen [14]
3 years ago
15

7. The value of y varies directly with x, and y = 8 when x = 2. Find y when x = 10.

Mathematics
1 answer:
lesya692 [45]3 years ago
4 0
Y= 40 explanation don’t want to just trust me it’s 40
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What is the scientific notation of 0.00165?
Ierofanga [76]

Answer:

The answer is 1.65*10^{-3}

Step-by-step explanation:

when writing scientific notation, there must be one number to the left of the decimal point.

To achieve this in this problem, you need to move the decimal point 3 times to the right.

because you are moving the point to the right, the exponent will be negative.

*rule of thumb: moving the decimal to the left will give you a positive exponent, moving to the right will give you a negative exponent*

therefore you answer should be written as:

1.65*10^{-3}

hope this helps :)

6 0
3 years ago
Gina wants to make
gavmur [86]

Answer:

6.75 pounds

Step-by-step explanation:

This question is of direct variation. We will use x as our answer. 8 is 2/3 of 12, so 4.5 should be 2/3 of x. We can now make an equation.

4.5=\frac{2}{3} x\\4.5*\frac{3}{2} =\frac{2}{3} x*\frac{3}{2} \\6.75=x

In order to solve the equation, we multiply both sides by the reciprocal of 2/3, which is 3/2.

* stands for multiplication

From solving our equation, we get 6.75. We can't forget the units, so the answer is 6.75 pounds.

3 0
3 years ago
Evaluate the expression for the given values of the variables.
vfiekz [6]

Answer:

A

Step-by-step explanation:

Substitute the given values into the expression

2a² + cb

= 2(5)² + 3(11)

= 2(25) + 33

= 50 + 33

= 83 → A

7 0
2 years ago
Using new equipment, a worker finished 4 more parts in an hour than was planned and fulfilled his daily task not in 8 hours, but
UNO [17]
Let the planned number of parts per hour = x 
<span> Then the planned number of parts for the day = 8x 
</span><span> By finishing 4 more parts in an hour than was planned (x + 4) he fulfilled his daily task in 6 hours. 
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</span><span> 6x + 24 = 8x 
</span><span> 2x = 24 
</span><span> x = 12 </span>
6 0
3 years ago
Maya spent her allowance on playing an arcade game a few times and riding the Ferris wheel more than once. Write about what addi
Goryan [66]

Answer:The information we need is how much money she had and how much she spent, also how much the games and Ferris wheel costs


Step-by-step explanation:


5 0
3 years ago
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