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gogolik [260]
2 years ago
9

Add 2.5 to the product of 4.2 and 0.2

Mathematics
2 answers:
9966 [12]2 years ago
7 0

Answer:

3.34

Step-by-step explanation:

the product is 4.2×0.2=0.84

add is 2.5 + 0.84=3.34

Fudgin [204]2 years ago
4 0

Answer:

3.34.

Step-by-step explanation:

4.2 * 0.2 + 2.5

= 0.84 + 2.5

= 3.34.

You might be interested in
A circle has a radius of 7 inches what is the area
Scrat [10]

Answer:

49π and 153.86 when multiplyed by 3.14.

Step-by-step explanation:

Hi!

The formula for finding the area of a circle is πr².

In that case, all we have to do is substitute 7 inches for our r.

7² × π

= 49π

If you want that solved out, we can substitute a rational number for π (3.14)

49 × 3.14 = 153.86

Thus, the area of the circle is \boxed{49\pi}, 153.86 roughly.

Hope this helps!

8 0
3 years ago
Solve by substitution or elimination<br> 4X – 3y = 7<br> 4x + y = 11
Simora [160]

Answer:

(5/2 , 1)

Step-by-step explanation:

4X – 3y = 7

4x + y = 11

———————

Multiply a -1 to the bottom equation to get the 4x as a negative so it cancels out.

4x - 3y = 7

-4x - y = -11

——————

-4y = -4

Divide by -4

y = 1

Substitute the value of y into one of the equations and solve

4x - 3(1) = 7

4x -3 = 7

4x = 10

Divide by 4

X = 10/4

Simplify by dividing by 2

x = 5/2

Therefore the answer is (5/2, 1 )

8 0
3 years ago
The length of a rectangle is 3 inches more than the width. The area is 10 square inches. Find the dimensions
mr_godi [17]

Answer:

Width = 2

Length = 5

Step-by-step explanation:

let A be the area of the rectangle

   L be the length of the rectangle

   w be the width of the rectangle

<u><em>Formula</em></u>: ‘<u><em>area of a rectangle</em></u>’

A = L × w

…………………………………………………

A = L × w

⇔ 10 = (w + 3) × w

⇔ 10 = w² + 3w

⇔ w² + 3w - 10 = 0  

<u><em>Solving the quadratic equation</em></u> w² + 3w - 10 =  0 :

Δ = 3² - 4(1)(-10) = 9 - (-40) = 9 + 40 = 49

then √Δ = 7

\Longrightarrow w=\frac{-b+\sqrt{\Delta } }{2a} =\frac{-3+7}{2} =2

  or\ w=\frac{-b-\sqrt{\Delta } }{2a} =\frac{-3-7}{2} =-5

-5 is not valid ,because w represents the width

which must be a positive number

Then  w = 2

<u><em>Conclusion</em></u>:

Width = 2

Length = 2 + 3 = 5

6 0
2 years ago
the length of a flag is 0.3 foot less than twice its width. if the perimeter is 14.4 feet longer than the width, find the dimens
forsale [732]
x-\ length\\&#10;y-\ width\\\\&#10;x+0.3=2y\ \ \ \ \ | subtract\ 0.3\\x=2y-0.3\\&#10;perimeter=2x+2y\\ 2x+2y-14.4=y\\\\&#10;2*(2y-0.3)+2y-14.4=y\\&#10;4y-0.6+2y-14.4=y\\&#10;6y-15=y\ \ \ | add\ 15\\&#10;6y=15+y\ \ | subtract\ y\\&#10;5y=15\ \ \ | divide\ by\ 5\\&#10;y=3\\&#10;x=2y-0.3=2*3-0.3=6-0.3=5.7\\\\&#10;Dimensions:\ length=5.7\ feet\, width=3\ feet.
4 0
3 years ago
What is the value of "2 + 3x" if x = ½? *
lara [203]

Answer:

3.5 or 3 1/2

Step-by-step explanation:

2 + (3*1/2) = 3.5, which is equal to 3 1/2.

3 0
3 years ago
Read 2 more answers
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