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makvit [3.9K]
2 years ago
12

andre says that 5 3/4 + 2 1/4 = 7 1/2 because 7 4/8 = 7 1/2 identiy his mistake draw a picture to prove that he is wrong

Mathematics
1 answer:
elena-14-01-66 [18.8K]2 years ago
5 0

The mistake he makes is by saying 3/4 + 1/4 = 4/8

The denominators stay the same when adding fractions, and the denominators must be the same value.

So instead, he should have 3/4 + 1/4 = 4/4 = 1

Overall, 5 3/4 + 2 1/4 = 5+2+1 = 8

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Shtirlitz [24]

Answer:

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7 0
3 years ago
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Simplify and solve for the unknown. Use order of operations as needed. Check your work.
antiseptic1488 [7]

Answer:

5

Step-by-step explanation:

Given: 5^3– 10^2 = X(8 – 2) + 2X – 3X

Solving the equation to find the value of x.

⇒ 5^{3} -10^{2} = x(8-2)+2x-3x

Using the distributive property of multiplication, multiplying x with 8 and -2

⇒125-100= 8x-2x+2x-3x

cancelling out -2x and 2x

⇒ 25= 8x-3x

⇒ 25= 5x

Multiplying both side by 5

⇒ x= \frac{25}{5}

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Hence, the value of unknown is 5.

3 0
3 years ago
Darnelle drew this figure and the accompanying equations.
kondor19780726 [428]

Answer:

Option D. w + x = z

Step-by-step explanation:

see the attached figure to better understand the problem

we have

w+x+y=180 ----> equation A

y+z=180 ----> equation B

equate equation A and equation B

w+x+y=y+z

Subtract y both sides

w+x=z

This equation satisfy the <em><u>Triangle Exterior Angle Theorem</u></em> (An exterior angle of a triangle is equal to the sum of the opposite interior angles)

4 0
3 years ago
Plz help and explain
Westkost [7]

Answer:  B

<u>Step-by-step explanation:</u>

In order to get the best representative sample, you should choose the widest range of students, which is from a random sample of all students.

(A) Choosing from only the 6th graders, eliminates the choices the other grade-level students would choose.

(C) Choosing only from students who participate in after-school activities, eliminates the choices the other students would choose.

(D) Chhosing only from students not participating in the fundraiser is silly since you want to know what the students participating in the fundraiser would choose.

The only possible option is B - students from all grades, regardless of whether or not they participate in after-school activities.

5 0
3 years ago
How many solutions does this system of linear<br> equations have? Explain.<br> xay<br> y = x+ 3
Charra [1.4K]
It is an infinite number of solutions. To put it simply, is x = 1, y would equal 4.you can do this with every single number.
8 0
3 years ago
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