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Bess [88]
2 years ago
9

This week Jill spent a total of 100 minutes studying this total was 8 more than four times the amount of minutes she studied las

t week how many minutes did Jill spend studying last week
Mathematics
2 answers:
DIA [1.3K]2 years ago
8 0

Answer:

The equation for this would be

4x + 8 = 100                                      

So, x = 23 minutes        

Step-by-step explanation:

Jill spent 23 minutes studying last week.

Sophie [7]2 years ago
3 0

Answer:

23

Step-by-step explanation:

  • 100 minutes - 8 = 92

because it was eight more.

  • 92 divided by 4 = 23

because it was four times the amount .

The answer is 23

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What is the value of the expression below when w=3?<br><br><br>6w-9
Nikitich [7]

Answer:

9

Step-by-step explanation:

Substitute w = 3 into the expression

6w - 9

= 6(3) - 9

= 18 - 9

= 9

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2 years ago
Which expression to a+ (c+7)?<br>​
Ann [662]

Answer:

(a + c) + 7

hope this helps

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The long jump distances of four students are listed in the table below. How much farther
Papessa [141]
I can’t answer this with out the distance they jumped.
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3 years ago
The probability of a spinner stopping on 3 is 1/8 The probability of the spinner stopping on 6 is 1/8 What is the probability of
Mumz [18]
Your answer is B 1/8 . 
4 0
2 years ago
I'm confused. Can someone help?
VARVARA [1.3K]

a.

The polynomial w^2+18w+84 cannot be factored

The perfect square trinomial is w^2+18w + 81

----------

The reason the original can't be factored is that solving w^2+18w+84=0 leads to no real solutions. Use the quadratic formula to see this. The graph of y = x^2+18x+84 shows there are no x intercepts. A solution and an x intercept are basically the same. The x intercept visually represents the solution.

w^2+18w+81 factors to (w+9)^2 which is the same as (w+9)(w+9). We can note that w^2+18w+81 is in the form a^2+2ab+b^2 with a = w and b = 9

================================================

b.

The polynomial y^2-10y+23 cannot be factored

The perfect square trinomial is y^2-10y + 25

---------

Using the quadratic formula, y^2-10y+23 = 0 has no rational solutions. The two irrational solutions mean that we can't factor over the rationals. Put another way, there are no two whole numbers such that they multiply to 23 and add to -10 at the same time.

If we want to complete the square for y^2-10y, we take half of the -10 to get -5, then square this to get 25. Therefore, y^2-10y+25 is a perfect square and it factors to (y-5)^2 or (y-5)(y-5)

8 0
3 years ago
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