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Svetach [21]
3 years ago
15

NEED HELP BEING TIMED !!! Which is the value of this expression when

Mathematics
2 answers:
Kruka [31]3 years ago
7 0
The answer is 4
I used the Safari calculator, so I really hope this is right. Best of luck to you
Makovka662 [10]3 years ago
5 0
4 I think or -4 so yea if it's not them I really don't know
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Compute each sum below. If applicable, write your answer as a fraction.
Alex777 [14]

Answer:

First equation is -425

Second equation is 11.25

Step-by-step explanation:

First equation we can write as

\sum_{i=0}^7 5 \times (-2)^i

computing

When i=0 -> 5 \times (-2)^0 =5

When i=1 -> 5 \times (-2)^1 = -10

...

When i=7 -> 5 \times (-2)^7 = --640

then replacing each term we have

5  + (-10) + ( 20) + ( -40) +  (80) +( -160) +   320 + (-640) = -425

For the second equation we'll have 9 terms, solving in a similar fashion

When i=1 -> \frac{1}{4}1=0.25

When i=2 -> \frac{1}{4}2=0.50

When i=3 -> \frac{1}{4}3=0.75

...

When i=9 -> \frac{1}{4}9=2.25

So we have 0.25 + 0.50 + 0.75 + 1.00 + 1.25 + 1.50+ 1.75 +2.00 +2.25

4 0
3 years ago
The equation of a line is 5x − 3y = 6. Which is the y-intercept of the line?
oksian1 [2.3K]

Answer:

y - intercept. = 2.

Step-by-step explanation:

Given  : The equation of a line is 5x − 3y = 6.

To find : Which is the y-intercept of the line.

Solution : We have given  5x − 3y = 6.

Equation of line y = mx +b

Where , m = slope , y intercept = b

Now we convert the  5x − 3y = 6 in line form y = mx +b

5x − 3y = 6

On subtracting both sides by 5x

-3x = - 5x + 6

On dividing both sides by - 3.

x = \frac{5x}{3}+2.

We cans see m = \frac{5}{3} , y - intercept. = 2.

Therefore, y - intercept. = 2.

7 0
3 years ago
Given the figure below, find the values of x and z.<br> X=<br> Z=<br> (11x - 93)<br> H<br> 116<br> X
Marrrta [24]

Answer:

x = 19

z = 64

Step-by-step explanation:

Angles (11x - 93)° and 116° are vertical angles, so their measures are equal.

11x - 93 = 116

11x = 209

x = 19

Angles z° and 116° are a linear pair, so they are supplementary, and their measures have a sum of 180°

z + 116 = 180

z = 64

6 0
1 year ago
How many times do you have to regroup to subtract 847 -268​
navik [9.2K]

Answer:

= 3 R 43

= 3 43/268

847 divided by 268 equals

3 with a remainder of 43

5 0
3 years ago
Solve this system of equations: y = 2t^2 + 3t + 500 and y = 3t^2 + t + 300
Jet001 [13]
2t^2 =4t+3t=5t
5t+500
3t^2=9t+t=10t
10t+300
7 0
4 years ago
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