I need help. I have been stuck on this for an hour now.

Mathematics

2 answers:

topjm [15]4 years ago

8 0

Answer:

The one about the beetles

Step-by-step explanation:

Margarita [4]4 years ago

5 0

I think the answer is

A beetle population first recorded at 10,000, has been declining over the last few years due to a pesticide. Each year, there are half as many beetles as they year before.

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12 less than the quotient of a number and seven is -2 find the number

kiruha [24]

A quotient is the result of a division.
Let the unknown number be x.

We translate the problem into an equation, piece by piece.

"quotient of a number and seven" ----> x/7

"12 less than the quotient of a number and seven" ----> x/7 - 12

The word "is" means "="
x/7 - 12 =

All the above is -2, so it equals -2.

x/7 - 12 = -2

$\dfrac{x}{7} - 12 = -2$

First, add 12 to both sides and simplify.

 $\dfrac{x}{7} - 12 + 12 = -2 + 12$


 $\dfrac{x}{7} = 10$ 

Next, multiply both sides by 7.

$\dfrac{x}{7} \times 7 = 10 \times 7$

$x = 70$

Answer: The number is 70.

5 0

3 years ago

Read 2 more answers

What is it counting by?

baherus [9]

It’s multiplying by 4.
1x4=4
4x4=16
16x4=64

3 0

3 years ago

The petrol tank at the local service station has a capacity of 6000L. It is 66.06 percent full. How many litres of petrol are ne

Rina8888 [55]

Since the tank is 66.06% full, it is (100 - 66.06) = 33.94% empty.

Its capacity is 6,000L. So, in order to fill it to capacity, the service station
must order 33.94% of 6,000L .

33.94% = 0.3394
"of" means "times"

0.3394 x 6,000L = 2,036.4 liters needed, to fill the tank to the rim.

7 0

3 years ago

Devaughn is 15 years younger than Sydney. The sum of their ages is 37 . What is Sydney's age?

posledela

Hi,
Let Sydney's age be x.
Devaughn=(x-15)
x+(x-15)=37
x+x-15=37
2x-15=37
2x=37+15
2x=52
x=52/2
x=26
Sydney is 26 years old.
Hope this Helps you.

7 0

4 years ago

Pls help me on this question. Do NOT answer 13 and 15. Only answer 14.

Ilia_Sergeevich [38]

1,700 good luck hope it helps you 100*17=1,700

4 0

3 years ago