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nlexa [21]
3 years ago
12

Evaluate 2x+5.6 x=1.4

Mathematics
2 answers:
Solnce55 [7]3 years ago
7 0

Answer:

8.4

Step-by-step explanation:

since x is equal to 1.4 you put 2(1.4)+5.6

u do 2(1.4) first which equals 2.8

then add 5.6 to it which equals 8.4

so the answer is 8.4

Y_Kistochka [10]3 years ago
6 0

Answer:

8.4

Step-by-step explanation:

<u>Step 1:  Set the value of x to 1.4</u>

2x + 5.6

2(1.4) + 5.6

2.8 + 5.6

8.4

Answer:  8.4

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What is the inverse and restricted domain of the equation 8x^2-3
kari74 [83]

Answer:  \bold{y=\pm \dfrac{\sqrt{2(x+3)}}{4},\qquad x\neq -3}

<u>Step-by-step explanation:</u>

y = 8x² - 3            (Restriction: none -  x is All Real Numbers)

The inverse is when you swap the x's and y's and then solve for y

x = 8y² - 3            <em>swapped the x and y</em>

x + 3 = 8y²           <em>added 3 to both sides</em>

\dfrac{x+3}{8}=y^2           <em>divided both sides by 8</em>

\sqrt{\dfrac{x+3}{8}}=\sqrt{y^2}           <em>square rooted both sides</em>

\pm \sqrt{\dfrac{x+3}{8}}=y           <em>simplified</em>

\pm \sqrt{\dfrac{x+3}{8}\bigg(\dfrac{2}{2}\bigg)}=y           rationalized the denominator

\pm \sqrt{\dfrac{2(x+3)}{16}}=y           <em>simplified</em>

\pm \dfrac{\sqrt{2(x+3)}}{4}=y           <em>simplified</em>

<u>Restriction:</u>

The radical <em>(inside the square root sign)</em> cannot be negative

→  2(x + 3) ≥ 0

      x + 3 ≥ 0         <em>divided both sides by 2</em>

      x       ≥ -3         <em>subtracted 3 from both sides</em>



4 0
3 years ago
Anfernee bought 4 umbrella and 5 hats and spent between $80.00 and 100.00. Each umbrella cost the same amount. Each hat cost the
barxatty [35]

Answer:

$15, $20

Step-by-step explanation:

Let u represent the unit price of umbrellas and h the unit price of hats.

Case 1:  A. spent $80.

Then $80 = 4u + 5($4), or $80 = $20 + 4u, or $60 = 4u, or

u = $15/umbrella.

Case 2:  A spent $100.

Then $100 = 4u + 5($4), or $100 = $20 + 4u, or $80 = 4u, or

u = $20/umbrella.

The least A. could have spent on a single umbrella was $15, and the most was $20.

6 0
3 years ago
PQRS and EFGH are polygons that can be mapped onto each other using similarity transformations. The transformation that maps pol
dsp73
I know its a scale factor of .5, i just don't know if its the rotation or reflection answer.
3 0
3 years ago
Read 2 more answers
I need to help with that
Bingel [31]
The ratio of people that can be served to milligrams of baking soda needed is:

Serving : Baking Soda
2 : 1600mg

Since you want 10 people, you can multiply this ratio by 5:5 to get 

10 people served = 8000mg needed

8000mg = 8 grams
3 0
3 years ago
A vertical plane passes through a pyramid that has a horizontal base. which of the following can be produced from the intersecti
Inessa [10]

Answer with explanation:

Pyramid and Plane both are three dimensional shapes.

Pyramid is a three dimensional shape having base any polygon and other faces as triangles.

The base of pyramid is horizontal.

1. If lower  base is a Square,or rectangle or any other parallelogram

And, then , plane cuts the pyramid vertically

It will be also, a three dimensional shape ,resembling a triangular cross section in three dimension.

Triangle is appropriate choice.

4 0
3 years ago
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