All categories

3 years ago

Please help!!!!!>>>>>>

Mathematics

1 answer:

12345 [234]3 years ago

3 0

Answer:

-3.3

Step-by-step explanation:

-2.3-(4.5-3 1/2)=-2.3-(4.5-3.5)=-2.3-(1)=-3.3

You might be interested in

Simplify: 3 [23 + (4 – 2)3 – (6 - 2)2] A. 3 B. 12 D. 24 E-3

diamong [38]

Answer:63

Step-by-step explanation:

4 0

3 years ago

If a and b are the roots of 11x^2-4x-2=0 then compute the product: (1+a+a^2+...)(1+b+b^2+...)

lisov135 [29]

Answer:

11/5

Step-by-step explanation:

FirLet a and b be the roots of 11x^2-4x-2=0

Now $(1+a+a^2+\cdots)(1+b+b^2+\dcots)=\frac{1}{1-a}\cdot \frac{1}{1-b}\\=\frac{1}{(1-a)(1-b)}=\frac{1}{1-(a+b)+ab}$

Dividing the quadratic equation by 11 we have

$x^2-\frac{4}{11}x-\frac{2}{11}=0.$

Now the sum of the roots is the minus of the coefficient of x and the product of the roots is the constant. Therefore

$a+b = 4/11 \\ab = -2/11$

and we have

$\frac{1}{(1-a)(1-b)}=\frac{1}{1-\frac{4}{11}-\frac{2}{11}}\\=\frac{1}{(5/11)}=\frac{11}{5}$

6 0

3 years ago

the sum of three numbers is 78. the third number is 2 times the second. the first number is 6 less than the second. what are the

MariettaO [177]

When we give x to second, then the third will be 2x and according to informations first one should be x-6. Then you have to sum all. It ll be equal to 4x-6.
78=4x-6
84=4x
21=x
So, first number is 15, second one is 21 and the last one is 42

6 0

3 years ago

Find the angle between the given vectors to the nearest tenth of a degree u I =, v =

zhuklara [117]

I’m confused I do t see anything

4 0

3 years ago

Find the equation of the line. Use exact numbers

dsp73

Answer:

y= 3x + 3

Step-by-step explanation:

From the graph we get 2 points: (-1,0) and (0,3)

(0,3) tells us that b = 3

and we use the equation $\frac{y1-y2}{x1-x2}$ to calculate m

m = $\frac{3-0}{0- (-1)}$ = 3/1 = 3

so plugging m and b into y = mx + b gives us

y = 3x + 3

5 0

3 years ago