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Nat2105 [25]
4 years ago
15

What is the answer to 7/8-(-1/10)+(-3/5)

Mathematics
1 answer:
morpeh [17]4 years ago
4 0

Answer:

3/8

Step-by-step explanation:

Find and apply the LCD.  In this case we have the three denominators 8, 10 and 5, which in factored form are 2(4), 2(5) and 1(5).  The factors that make up the LCD are 2, 4 and 5, or 40.  Note that 8, 10 and 5 all divide evenly into 40.

So our expression, 7/8-(-1/10)+(-3/5), can be rewritten as:

35/40 + 4/40 - 24/40, which simplifies first to 39/40 - 24/40, and then to:

15/40.

This 15/40 reduces to 3/8.

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Betty is having invitations printed for a holiday party. It costs $3.70 to set up the printing machine and $1.55 per invitation.
PIT_PIT [208]
Y = 1.55x + 3.70
1.55 x 150 = 232.5
232.5 + 3.70 = 236.2

The answer is C 236.20 hope that helped.
4 0
3 years ago
At the football concessions stand, Tia sold 78 hamburgers and chicken tenders. If she
Murrr4er [49]

I am going to do this problem with more of an algebraic approach weather or not its the way your teacher wants you to do it like this.

The way to do things algebraically is to just set variables for what you want to find and set up equations to represent each sentence.

As seen there are hamburgers and chickens in this problem. So let's set the numbers of hamburgers to x, and the numbers of chickens to y.

Now write out each sentence using variables.

1.) Tia sold 78 hamburgers and chicken tenders.

x+y=78

2.) If she sold 24 more hamburgers than chicken tenders.

x=y+24

Now that we have the 2 equations, its time to solve.

Since we have x=y+24, we can replace the x in the first equation with the second equation

y+24+y=78

2y+24=78

Now we can subtract 24 from both sides.

2y=54

Simplify

y=27

Solve for x

x=27+24=51

Done!

6 0
3 years ago
Jo jo has a total amount of $12.45 in quarters and dimes in his pocket. he has a total of 60 coins. how many quarters and dimes
baherus [9]

Given:

Total number of coins (Quarters and dimes) = 60

Total amount = $12.45

To find:

The number of quarters and dimes.

Solution:

Let x be the number of quarters and y be the number of dimes.

We know that,

1 quarter = 0.25 dollar

1 dime = 0.10 dollar

Total coins: x+y=60               ...(i)

Total amount: 0.25x+0.10y=12.45             ...(ii)

From (i), we get

y=60-x          ...(iii)

Putting this value in (ii), we get

0.25x+0.10(60-x)=12.45

0.25x+6-0.10x=12.45

0.25x-0.10x=12.45-6

0.15x=6.45

Divide both sides by 0.15.

x=\dfrac{6.45}{0.15}

x=43

Putting x=43 in (iii), we get

y=60-43

y=17

So, the number of quarters is 43 and the number of dimes is 17.

Therefore, the correct option is b.

8 0
3 years ago
Help plz
olga55 [171]
B. 47 degrees

Explanation:
They already cut 43 degrees and they want to cut until a right angle is form which is 90 degrees. To find how much more they have to cut, do 90-43 which gives you 47.
4 0
3 years ago
2) Luciano é dono de um terreno em forma de trapézio que possui bases de 10 e 18 metros e comprimento de 8 metros. Qual a área d
Irina18 [472]

Answer:

<h2>(d) 112 m²</h2>

Step-by-step explanation:

We know by given that the bases of the form are 10 and 18 meters, and its height is 8 meters.

The area of a trapezoid is defined as

A=\frac{(B+b)h}{2}

Replacing given values, we have

A=\frac{(18+10)8}{2}=112 \ m^{2}

Therefore, the right answer is D.

5 0
4 years ago
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