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2 years ago

Really confused on this and need some help to figure this out (i'll give a brainliest to whoever will help)

Mathematics

1 answer:

inna [77]2 years ago

4 0

Answer:

Step-by-step explanation:

The angles are complementary as they add up to make a right angle/ 90° as indicated by the small square. So let's make an equation and solve for x :

x-20 + x = 90

Add 20 to both sides :

x+x = 110

2x = 110

Divide both sides by 2 :

x = 55

Hope this helped and have a good day

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Mrs. Williams needed to make 4 1/2 of fruit salad for a class party.

ziro4ka [17]

Answer:

strawberry=7/8

Step-by-step explanation:

treat strawberry as x

add on proportions

1 1/8+ 3/4+ 1 3/4 + x = 4 1/2

(9+6+14)/8 + x = 9/2

29/8 +x = 9/2

x= 9/2 - 29/8

x= (36-29)/8

x=7/8

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3 years ago

Which expression is equivalent to 5x + 10 y - 15

klasskru [66]

The answer is the first one because you have to multiply the outsider five to the other numbers inside the parenthesis. You don't add them or subtract them because they don't have the same variable

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3 years ago

Can someone please help<br> me complete<br> the table

Lady bird [3.3K]

Answer:

Step-by-step explanation:

-2, 1, 2, 4

7 0

3 years ago

How many different three-digit numbers can be written using digits from the set 5, 6, 7, 8, 9 without any repeating digits?

suter [353]

Answer: 60 different numbers can be formed

Step-by-step explanation:

Note that we have 5 different digits, and we must select 3 of them. They should not be repeated

The order of selection is important in this case, because the number 532 is not the same as the number 235.

So we have a permutations problem, where we have a set of n elements and we want to choose r from them.

Then we define the permutacion as:

$nPr=\frac{n!}{(n-r)!}$

In this case note that n=5 because there are 5 elements in the set.

r = 3 because we combine the elements to form three-digit numbers

Then:

$5P2=\frac{5!}{(5-3)!}$

$5P2=\frac{5!}{2!}$

$5P2=\frac{5*4*3*2!}{2!}$

$5P2=5*4*3$

$5P2=60$

4 0

3 years ago

Ling is using fraction strips to add 2/3 and 7/12's The sum is one whole Plus how many twelves?

Leno4ka [110]

Hello from MrBillDoesMath!

Answer:

3/12 (aka 1/4)

Discussion:

2/3 + 7/12 = 8/12 + 7/12 => as 2/3 = (2*4)/(3*4) = 8/12

= 15/12

= 1 + 3/12

Thank you,

MrB

5 0

4 years ago