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4 years ago

i have math questions that i need answers for please loook at the photos, please do them in order so i know please and thankssss

Mathematics

1 answer:

nikitadnepr [17]4 years ago

7 0

The first picture about the rational numbers I am not sure the answer.

In the second picture the set that are all equivalent to the fraction is the second set.

In the third picture

the equivalent expression is the first one.

In the fourth picture the correct situation is the first one about buying popcorn.

Hope this helps a little, sorry I could not help more.

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If the area of a rectangle is 85 square meters, and the width is ten meters

Ket [755]

Answer: E.) 41.95m

Step-by-step explanation:

Area (A) = 85 square meters

Length (L) = a

Width (W) = (a - 10) meters

Area of rectangle(A) = Length (L) × Width (W)

85 = a × (a - 10)

85 = a^2 - 10a

a^2 - 10a - 85 = 0

Using quadratic equation solver :

a = 15.488088482 or a = −5.488088482

Since a cannot be negative, a = 15.49m

Therefore, Length (L) = 15.488m

Width(W) = a - 10 = (15.488 - 10) = 5.488m

Perimeter of rectangle(P) :

P = 2 (L + W)

P = 2 (15.488 + 5.488)

P = 2(20.976)

P = 41.952m

P = 41.95m

4 0

3 years ago

Plz someone help me with questions 1 and 2 bcz I’m stressing out and don’t understand it.

Ksju [112]

Answer:

1.) is 78 2.) is 4

Step-by-step explanation:

4 0

4 years ago

42% of what number is 0.21 ?

Slav-nsk [51]

42% of x= 0.21
0.42x=0.21
x= $\frac{0.21}{0.42}$
x=0.5

8 0

3 years ago

Ill give brainlist. Answer asap please.;-;

igor_vitrenko [27]

Answer:

the third one

Step-by-step explanation:

4 0

3 years ago

Q # 6 please multiply help

Mkey [24]

This is a problem of Difference-of-squares. We know that for a difference of squares $a^2-b^2$ the factorization is given by:

$(a-b)(a+b)$

To learn this you need to remember that a difference means subtraction. So applying those concepts we can solve this problem step by step.

Applying distributive property:

$(2n)(2n-2)+2(2n-2)$

Applying distributive property again:

$4n^2-4n+4n+4$

Simplifying:

$4n^2-4$

The correct answer is C

3 0

3 years ago