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horsena [70]
3 years ago
9

Complete the steps for solving 7 = -2x2+10x

Mathematics
2 answers:
V125BC [204]3 years ago
4 0
Step 1: move all terms to one side

7 + 2x^2 - 10x = 0

Step 2: Use the quadratic formula

X = 10 + 2(square root of 11). 10-2 _/—-11
————————————. ——————
4. , 4

Step 3: Simplify solutions

X= 5 + (square root of 11) 5 - (square root 11)
——————————- , ————————
2. 2
larisa [96]3 years ago
3 0

Answer:

Factor -2 out of the variable

Add 24/4 inside the parentheses and subtract 25/2

on the left side of the equation

White the perfect square trinomial as a binomial squared

Divide both sides by -2

Use the square root property of equality

Add 5/2 to both sides

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dentify the type of data​ (qualitative/quantitative) and the level of measurement for the native language of survey respondents.
ohaa [14]

Answer:

The correct option is D i.e. Quantitative because numerical values found by either measuring or counting are used to describe the data.

Step-by-step explanation:

As the number of respondents is a numerical value and is identified by counting thus it is a quantitative variable. Also all the other options are incorrect.

A is incorrect because the reason described is not the property of  quantitative data.

B is incorrect because the data is not described in descriptive terms.

C is incorrect because the reason described in not a property of qualitative data.

7 0
3 years ago
42 = -7 ( Z - 3 )<br> Z =?
ipn [44]

Answer:

-3

Step-by-step explanation:

6 0
3 years ago
Select the statement that describes this expression: 10 + fraction 1 over 4x (5 + 3) − 3.
Tanya [424]

Answer:

B

Step-by-step explanation:

because i said so

5 0
1 year ago
Find the value of each variable<br> x= <br> y=<br> z=
zvonat [6]

Answer:

Step-by-step explanation:

A 45 degree angle in a right triangle produces 2 equal sides. In this case z and the perpendicular line are equal. So that's were we'll start. Then you move on to the 60 degree angle to get x and y.

Finding z

z^2 + z^2 = (24√2)                    Combine the left

2z^2 = 24^2 * 2                         Divide both sides by 2

2z^2/2 = 24^2/2

z^2 = 24^2                                 Take the square root of both sides

√z^2 = √24^2

z = 24

Finding x and y

The perpendicular = 24. Because it is a 60 degree angle that's given, we can do this without a calculator.

Tan 60 = opposite over adjacent

sqrt(3) = Perpendicular / z                      Multiply both sides by z

z*sqrt(3) = perpendicular

The above calculation tells us the perpendicular is 24

z*sqrt(3) = 24                                           Divide by sqrt 3

z = 24/√3

z = 24/1.73

z = 8√3

Finding x

Use Pythagoras to determine x

Perpendicular^2 + (8√3)^2 = x^2

24^2 + 8^2*3 = x^2

576 + 192 = x^2

768 = x^2

√x^2 = √768

x = 27.71

7 0
1 year ago
A chipmunk can run 5 m/s. A fox can run 8 m/s. If the chipmunk and the fox running at the same time, will the chipmunk make it t
nikklg [1K]
No, because the fox runs quicker and will catch up to the chipmunk.

Hope this helps :)
3 0
3 years ago
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