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raketka [301]
3 years ago
12

Charley's grade in the three quarters are 85, 88, and 92. If she targets to have an average

Mathematics
1 answer:
topjm [15]3 years ago
5 0

Step-by-step explanation:

We can set up an average equation in the form, where x is the last score in the fourth quarter:

\frac{85 + 88 + 92 + x}{4} = 90

85 + 88+92 + x =360\\\\x = 95

She needs at least a 95 on the last quarter to average 90 in all four quarters.

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this makes no sense so maybe  try something better

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2 years ago
Andrea has been asked to move several boxes of packing peanuts from the main office to the store room. She will have to carry ea
4vir4ik [10]

Answer:

yes she needs assistance

Step-by-step explanation

3 0
2 years ago
Name the line of reflection used to map each preimage to its image
rewona [7]

Answer:

From the picture attached,

9). When pre-image KLMN is a reflected across x = -2, we get image K'L'M'N'.

   Therefore, line of reflection will be x = -2

10). In this picture line of reflection which passes through origin (0, 0) and slope = 1 will be,

y = x.

11). Since, all the points of image and preimage points are equidistant from x-axis, line of reflection will be x-axis or y = 0.

12). Line passing through midpoint of the line joining BB' will be the line of reflection.

Coordinates of B → (5, 3)

Coordinates of B' → (5, 7)

Coordinates of BB' →  → (5, 5)

Therefore, line of reflection will be y = 5.

13). Coordinates of G → (2, 5)

    Coordinates of G' → (-2, 5)

    Midpoint joining the segment GG' →  → (0, 5)

    Therefore, line of reflection → x = 0

14). Line of reflection passing through (0, 0) and slope = -1

    y = -x

Step-by-step explanation:

3 0
2 years ago
Joe ran 3 miles yesterday and wants to run at least 15 miles
igomit [66]

Answer: 3(x)≥15 →x≥5

Step-by-step explanation:

Set it up with x as the number of days. Then multiply that by 3, so that you get 3(x). This will show that for an x amount of days, you ran 3 miles. then set it to MORE THAN or EQUAL TO 15. Then divide both sides by 3, and you get the above answer.

4 0
3 years ago
\begin{aligned} &amp;y=2x +1 \\\\ &amp;x-y=-3 \end{aligned} ​ y=2x+1 x−y=−3 ​ Is (2,5)(2,5)left parenthesis, 2, comma, 5, right
trapecia [35]

Answer:

Yes

Step-by-step explanation:

Given the system of equations

\begin{aligned} &y=2x +1 \\\\ &x-y=-3 \end{aligned}

We want to determine if (2,5) is a solution of the system.

We can do this by substitution of the given point into the equations and see if it holds.

Given (x,y)=(2,5), x=2, y=5

<u>In the first equation</u>

y=2x+1

5=2(2)+1

5=5

Therefore, <u>the point (2,5) satisfies the first equation.</u>

<u>In the second equation</u>

x-y=2-5=-3

Since our result (-3) is equal to the Right Hand Side, <u>the point also satisfies the second equation.</u>

<u />

Therefore, (2,5) is a solution of the system.

7 0
2 years ago
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