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3 years ago

Whats three and one half minus four and one half

Mathematics

1 answer:

liubo4ka [24]3 years ago

8 0

= 10 hole minus. U add the two halfs then ad the hole minus

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What are the solutions to the quadratic equation below x^2+20x+100=7

aleksandrvk [35]

First you must have the quadratic equal to zero. In order to do this you must subtract 7 to both sides

x^2 + 20x + (100 - 7) = 7 - 7

x^2 + 20x + 93 = 0

Now you must find two numbers who's sum equals 20 and their multiplication equal 93

Are there any? NO!

This means that you have to use the formula:

$\frac{-b±\sqrt{b^{2} - 4ac} }{2a}$

In this case:

a = 1

b = 20

c = 93

$\frac{-(20) plus/minus\sqrt{20^{2} - 4(1)(93)} }{2*1}$

$\frac{-20 plus/minus\sqrt{400 - 372} }{2}$

$\frac{-20 plus/minus\sqrt{28} }{2}$

^^^We must simplify √28

√28 = 2√7

so...

$\frac{-20 plus/minus 2\sqrt{7} }{2}$

simplify further:

$-10 plus/minus\sqrt{7$

-10 + √7

-10 - √7

***plus/minus = ±

Hope this helped!

~Just a girl in love with Shawn Mendes

7 0

3 years ago

1<br> Enter the correct answer in the box.<br> Simplify the expression (62,4.

adelina 88 [10]

Answer:

248

Step-by-step explanation:

(62)4

= 62 x 4

= 248

4 0

3 years ago

80 is 50% of what number

KonstantinChe [14]

Answer:

80 is 50% of 160.

Step-by-step explanation:

In order to find this, we take the whole number and divide by the percentage that it represents. This gives us the number we are looking for.

80/50%

80/.50

160

3 0

3 years ago

Read 2 more answers

A worker receives ₹700 for 8 hours of a work a day. How much should he receive for 2 hours?

melomori [17]

Answer:

175 is the answer

Step-by-step explanation:

$700 = 8$

$700 \times 2 = 1400$

$1400 \div 8 = 175$

3 0

3 years ago

In the figure below, AB is a diameter of circle P.

saw5 [17]

Answer:

317

Step-by-step explanation:

I did this on khan academy

6 0

3 years ago