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3 years ago

The product of 3 and a number increased by 8 is 31

Mathematics

1 answer:

xz_007 [3.2K]3 years ago

5 0

Answer:

7.67

Step-by-step explanation:

3x+8=31

-8 -8

3x=23

/3 /3

x=7.67

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Find 3 consecutive even numbers where the product of the smaller two numbers is 40 less than the square of the largest number.

Marina86 [1]

$3\ consecutive\ even\ numbers:\ 2x,2x+2,2x+4\\\\2x(2x+2)+40=(2x+4)^2\\\\
4x^2+4x+40=4x^2+16x+16\\\\
4x^2-4x^2+4x-16x=16-40\\\\-12x=-24\ \ |:(-12)\\\\x=\frac{24}{12}=2\\\\2x=2=4\\\\2x+2=6\\\\2x+4=8\\\\Numbers\ are\ 4,6,8.$

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3 years ago

2. The hundredths model is shaded to represent a division

solniwko [45]

Answer:

Option D

Step-by-step explanation:

If the whole grid is considered to be 1,

Each small grid will value = $\frac{1}{100}=0.01$

There are 72 shaded grids which represent the hundreds = 0.72

When these grids have been divided into 9 equal rows, number of grids in each row = 8

And the value of 8 grids in each row = 0.01 × 8 = 0.08

So the equation is,

0.72 ÷ 9 = 0.08

Therefore, equation represented by the model will be Option (D).

4 0

3 years ago

A beaker contains 1 1/4 pants of a chemical. A scientist pours the chemical out of the beaker until three fluid ounces remain.

Pepsi [2]

He poured 34 fl oz it sounds wrong but it’s correct

6 0

3 years ago

Please help.........

faust18 [17]

The answer for PA is 60/13. This is found by
The area of the rectangle is 60, therefore, the big triangle areas are 30 each. We know that the hypotenuse is 13, so therefore, we get
1/2(13*PA) = 30. This then simplifies to
13 * PA = 60, which then turns into
PA = 60/13.

Hope this helps and have a nice day:)

5 0

3 years ago

What is the answer to this

s2008m [1.1K]

Answer:

x = 9/5

Step-by-step explanation:

4 0

3 years ago