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Tems11 [23]
3 years ago
12

Find the sum:28.43 + (-13.17) + 2.07

Mathematics
2 answers:
Masja [62]3 years ago
4 0
28.43 + (-13.17) + 2.07 =17.33
Lena [83]3 years ago
3 0
Okay, just remember with signs, a positive and a negative equals a negative.

28.43-13.17+2.07= 17.33

I hope this helped!

Brainliest answer is always appreciated!
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Tcecarenko [31]

Answer:

<2=65 degrees

Step-by-step explanation:

Information provided:

Right angle=90

<25 degrees

Triangles add up to 180 degrees

90+25=115

180-115=65 degrees

Hope this helps! :)

6 0
2 years ago
Can someone please help me with #18?I would really appreciate it.
Sveta_85 [38]
I think when you divide decimals the numbers get bigger but when you divide by a whole number, they get smaller.
7 0
3 years ago
Hayley so 20 tickets to the school play for total of $225. Early bird tickets were $10 regular priced tickets are $15. Wright an
alexandr402 [8]

System of Equations

For the problem to solve we'll use the following variables:

x = number of the early bird tickets sold

y = number of the regular tickets sold

Haley sold a total of 20 tickets, thus:

x + y = 20 [1]

Early bird tickets cost $10 and regular tickets cost $15, thus the total money collected is:

10x + 15y = 225

Dividing by 5:

2x + 3y = 45 [2]

We have to solve the system of equations [1] and [2].

Multiply [1] by -2:

-2x - 2y = -40 [3]

Add [3] to [2]:

-2x - 2y +2x + 3y = -40 + 45

Simplifying:

y = 5

Substituting in [1]:

x + 5 = 20

Subtracting 5:

x = 20 - 5

x = 15

Solution: Hayley sold 15 early bird tickets and 5 regular-priced tickets

The order pair solution is (15,5)

5 0
1 year ago
Quantities x and y are in a proportional relationship.
Rashid [163]

Answer:

yes they are

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Katy invests a total of $26,500 in two accounts paying 4% and 9% annual interest, respectively. How much was invested in each ac
White raven [17]
A = amount invested at 4%.

b = amount invested at 9%.

we know the total amount invested was $26500, thus a + b = 26500.

whatever% of anything is just (whatever/100) * anything.

how much is 4% of a?  well, is just (4/100) * a, or 0.04a.

how much is 9% of b?  well, is just (9/100) * b, or 0.09b.

we know the interest yielded for both amounts adds up to $1510, thus 0.04a + 0.09b = 1510.

\bf \begin{cases}&#10;a+b=26500\implies \boxed{b}=26500-a\\&#10;0.04a+0.09b=1510\\&#10;----------------\\&#10;0.04a+0.09\left( \boxed{26500-a} \right)=1510&#10;\end{cases}&#10;\\\\\\&#10;0.04-0.09a+2385=1510\implies -0.05a=-875&#10;\\\\\\&#10;a=\cfrac{-875}{-0.05}\implies a=17500

how much was invested at 9%?  well, b = 26500 - a.
7 0
3 years ago
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