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Lady bird [3.3K]
3 years ago
14

I have to use mental math to solve everything and I'm only in 5th grade and I confused ‍♀️ also I don know what to do

Mathematics
2 answers:
Keith_Richards [23]3 years ago
5 0

Answer:

can you type the question? my chromebook wont show me the link

Step-by-step explanation:

kenny6666 [7]3 years ago
3 0

Answer:

B: 287

D: 300

Step-by-step explanation:

D

d is certainly a lot easier than b.  Start by understanding that 12 = 6 + 6 which you should be able to handle in your head.

6 * 25 + 6*25

150 + 150

300

This is a prized skill. You should practice it all the time. It leads to estimation which is something you should try to do in any math class you take.

B

How about 10 twenty-sixes + 1 twenty-six. Let's see how that works out.

10* 26 + 26

260 + 26

286   You should check to see if that works. Notice that the 2 and the 6 add to 8 which is what they should do if you are multiplying by 11. The end numbers add to the middle one for 3 digits. It get's a little messy when the end two number add to something greater than 10, but that's another story.


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Answer:

Third one? I'm not sure though.

Step-by-step explanation:

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2 years ago
2.98 times 10 to the 3rd power in standard notation
stiks02 [169]

Answer:

2980

Step-by-step explanation:

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3 years ago
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Which equation can you use to solve for x? x + 56 = 180 x + 146 = 180 180−x=146 x + 56 = 146 The figure contains a pair intersec
Harlamova29_29 [7]
The correct question is
<span>Which equation can you use to solve for x? x + 56 = 180 x + 146 = 180 180−x=146 x + 56 = 146 The figure contains a pair intersecting lines. One of the four angles formed by the intersecting lines is labeled 146 degrees. The angle opposite and not adjacent to this angle is broken into two smaller angles by a ray that extends from the point where the two lines intersect. One of these smaller angles is labeled 56 degrees, and the other smaller angle is labeled x degrees.

see the picture attached to better understand the problem

we know that
angle 146</span>° and angle (56°+x°) area equal -----> by vertical angles
so
146=56+x
therefore

the answer is
<span>x + 56 = 146</span>

3 0
3 years ago
Consider quadrilateral ABCD shown.
podryga [215]

Answer:

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Step-by-step explanation:

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3 years ago
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Ml
Tanya [424]

Answer:

<em>The gold vein is  96 miles away from the farthest gold dust strike.</em>

Step-by-step explanation:

<u>Distance Between two Points in the Plane </u>

Given two points A(x,y) and B(w,z), the distance between them is:

d=\sqrt{(z-y)^2+(w-x)^2}

The prospector positioned the gold vein at  (-2,9) and the farthest gold dust strike at (94,9). We are required to calculate the distance between these two points. Use the formula:

d=\sqrt{(9-9)^2+(94-(-2))^2}

d=\sqrt{0^2+96^2}

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The distance is 96 units, but we know each unit on the graph represents 1 mile, thus the gold vein is 96 miles away from the farthest gold dust strike.

8 0
2 years ago
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