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wel
3 years ago
11

Xiao's teacher asked him to rewrite the sum 60+90 is the product of the GCF of the two numbers and the sum. Xiao wrote 3(20+30).

What mistake did he make? How should he have written the sum?
Mathematics
1 answer:
larisa [96]3 years ago
5 0
Xiao was mistake because 3(20+30) still can divide by 10. The sum is 30(2+3)
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4x^2-7x+3

Step-by-step explanation:

(4x-3)(x-1)

4x^2-4x-3x+3

4x^2-7x+3

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Simplify the expression (3k / 8)^2​
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Step-by-step explanation:

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What is the area of a circle with radius 6 cm? Give your answer in terms of 2 points
vodka [1.7K]

22/7*6*6=792/7

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5 0
3 years ago
PLEASE HELP ASAP!!!!
OleMash [197]

Answer:

y = -2x + 8

Step-by-step explanation:

The point slope form of an equation is written as

y = mx + c              ...............(i)

Where m is the slope and c is the constant

Now we Know that the equation is

y + 2 = -2(x-5)

and the given points are

m= -2

x = 5

and y= -2

Putting these values in equation (i) to find the value of c

y = mx + c

it becomes

-2 = -2(5) + c

-2 = -10 + c

Adding 10 on both sides

-2 + 10 = -10 + 10 + c

8 = c

or c=8

Now we have the values of m and c

where m= -2 and c = 8

Point slope form of an equation is

y = mx + c

putting the values of m and c to get equation in slope intercept form is

y = (-2)x + 8

or

y = -2x + 8


Other method:

The given point slope form is

y + 2 = -2(x-5)

We have to change it in y= mx + c      form

so solving it

y + 2 = -2x + 10

Subtracting 2 from both sides

y + 2 -2 = -2x + 10 -2

y = -2x + 8

which is same is

y=mx + c

so the required equation is

y = -2x + 8  

7 0
3 years ago
Which is the solution set for –7 ≤ 4x + 1 ≤ 5?<br><br> I added a picture !
Oksi-84 [34.3K]
-7\leq4x+1\leq5\ \ \ \ |subtract\ 1\\\\-7-1\leq4x+1-1\leq5-1\\\\-8\leq4x\leq4\ \ \ \ |divide\ by\ 4\\\\-8:4\leq4x:4\leq4:4\\\\\boxed{-2\leq x \leq1\Rightarrow x\in[-2;\ 1]}

\boxed{x\geq-2\ and\ x\leq1}\to\answer{\boxed{C}}
6 0
3 years ago
Read 2 more answers
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