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faust18 [17]
4 years ago
13

Max spent 15 hours doing her homework last week. This week she spent 18 hours she says she spent 120% more time doing homework t

his week. Is she correct. Show your work to justify.
Mathematics
1 answer:
Mila [183]4 years ago
6 0

Answer:

Maxine is correct

Step-by-step explanation:

Given

last week= 15 hours

this week= 18 hour

Prove that hours this week is 120% than the hours last week

15 hours* 120%= 18 hours

18 hours/ 15 hours=1.20 x 100%= 120%

Maxine is correct. She spent 120% more time doing homework this week.

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Anne and Willow are reading the copy of the same magazine for an assignment.
Kamila [148]

Answer:

Page number 74

Step-by-step explanation:

Let

x ---> the number of days

y ---> the number of pages read

we know that

The linear equation in slope intercept form is equal to

y=mx+b

where

m is the slope

b is the y-intercept

we have

<em>Anne</em>

The slope is equal to

m=20\ \frac{pages}{day}

The y-intercept is equal to

b=14\ pages

substitute

y=20x+14 ----> equation A

<em>Willow</em>

The slope is equal to

m=22\ \frac{pages}{day}

The y-intercept is equal to

b=8\ pages

substitute

y=22x+8 ----> equation B

equate equation A and equation B

22x+8=20x+14

solve for x

22x-20x=14-8\\2x=6\\x=3\ days

Find the value of y

substitute the value of x in equation A or equation B

equation A

y=20(3)+14=74\ pages

equation B

y=22(3)+8=74\ pages

7 0
3 years ago
Points P, Q, and S are collinear.<br><br> What is m∠SQR?
RideAnS [48]

Answer:

m∠SQR = 74°

Step-by-step explanation:

Points P, Q and R are collinear.

Therefore, angles PQR and angle RQS are the linear pair of angles.

Since linear pair of angles are supplementary angles.

m∠PQR + m∠RQS = 180°

By substituting the measures of the given angles,

(3m + 1) + (2m + 4) = 180

5m + 5 = 180

5m = 180 - 5

5m = 175

m = \frac{175}{5}

m = 35

Since, m∠SQR = (2m + 4)°

                        = (2×35) + 4

                        = 74°

Therefore, m∠SQR = 74° is the answer.

8 0
4 years ago
A ball is thrown from initial height of 2 feet with an initial upward velocity of 35 ft./s. The ball's height H (in feet) after
vodka [1.7K]
So if the height is going to be 20ft, that means 20 = 2+35t-16t²

\bf 20=2+35t-16t^2\implies 16t^2-35t+18=0&#10;\\\\\\&#10;\textit{now, it doesn't factor in integers, thus}&#10;\\\\\\&#10; \textit{quadratic formula}\\\\&#10;x= \cfrac{ - {{ b}} \pm \sqrt { {{ b}}^2 -4{{ a}}{{ c}}}}{2{{ a}}}\implies t=\cfrac{-(-35)\pm\sqrt{(-35)^2-4(16)(18)}}{2(16)}&#10;\\\\\\&#10;t=\cfrac{35\pm\sqrt{73}}{32}\implies t\approx&#10;\begin{cases}&#10;1.361\\&#10;0.828&#10;\end{cases}
8 0
3 years ago
Read 2 more answers
If x = 2 and y=-3, then -xy^2 =<br> A) -36<br> B) 18<br> C) -12<br> D) - 18
Citrus2011 [14]

Answer:

-18

Step-by-step explanation:

-xy^2 =

Let x=2 and y = -3

-(2) (-3)^2

-2 (9)

-18

4 0
3 years ago
I NEED HELP WITH THIS !
Darina [25.2K]
62.85 times so basically 63 times
8 0
3 years ago
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