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4 years ago

Use mental math to multiply. 12×26

1 answer:

4 0

There are many ways to do this.
1. 12 * 26 = (10 +2)*26 = 260 +52 = 312

2. 12*26 = (10*20) +10*(1*6 +2*2) +(2*6) = 200 +100 +12 = 312

3. 12*26 = 4*3*26 = 4*78 = 2*156 = 312

4. 12*26 = 3*4*26 = 3*2*52 = 3*104 = 312

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I need help with these

3241004551 [841]

1. a= 60 (vertically opposite angles)

b= 360-(60+60)=240/2= 120 (angles at a point)

c= 120 (vertically opposite angles with b)

2. c= 90-40= 50 (vertically opposite angles)

b=a=360-90-90=180/2=90 (angles at a point)

3. a= 180-52-51= 77 (angles on a straight line)

b=52 (angles at a point)

d=51 (angles at a point)

c=77 (angles at a point)

4. a= 60 (vertically opposite angles)

b= 360-(60+60)=240/2= 120 (angles at a point)

c= 120 (vertically opposite angles with b)

e=65

d=f= 360-65-65=230/2=115

h=55

i=g=360-55-55=250/2=125

5. b=163

a=90

e=70

d=360-70-70=220/2=110

c=360-163-163=34/2=17

Hope this helps!

4 0

3 years ago

John want to buy a pair of boots that originally cost $85.99 He found a coupon for %30 off what will he pay for the boots?

gulaghasi [49]

Answer:

$60.19

1.) 85.99 x 0.30

2.) 25.797 - 85.99

3.) 60.193

4.) round

$60.19

Hope this helped!

3 0

3 years ago

Read 2 more answers

What is 50,000,000,000 200,000 30,000 in standard form

Stolb23 [73]

50000230000 is how to write 50,000,000,000 + 200,000 + 30,000 in standard form.

6 0

3 years ago

Alan needs to drive 400 miles to reach Madison. He is driving at a constant speed of 55 miles per hour. The function y = 400 − 5

lord [1]

Question is not written properly but i think you are looking for the table of given equation y=400-55x. So I will explain about how to get that.

number of hours can't be negative so that means x must be 0 or more.

like x=0,1,2,3,...

we just have to plug these x-values into above equation to find the y-value in order to calculate table.

I will show you calculation for x=2

y=400-55x=400-55*2=400-110=290

so the point in table will be (2,290)

similarly we can find more point and get final table as shown below:

7 0

4 years ago

Which of the following demonstrates how the 20 is calculated using the<br> combination pattern?

ZanzabumX [31]

Answer:

Step-by-step explanation:

The diagram shows Pascal's triangle. Pascal's triangle is a triangular array of the binomial coefficients.

The entry in the $n^{th}$ row (start counting rows from 0) and $k^{th}$ column (start counting columns from 0) of Pascal's triangle is denoted by

$C^n_k=\left(\begin{array}{c}n\\ k\end{array}\right)$

Coefficient 20 stands in 6th row, then n = 6 and in 3rd column, so k = 3.

Hence,

$20=C^6_3=\left(\begin{array}{c}6\\ 3\end{array}\right)=\dfrac{6!}{3!(6-3)!}$

4 0

4 years ago