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frez [133]
3 years ago
7

simplify: 7r + 10 - 2(2r + 3s - 5t) + 2(4s - t) + 5?

Mathematics
2 answers:
Rudik [331]3 years ago
8 0

Answer:

3+2+8+15

Step-by-step explanation:

it's right, trust me

tatuchka [14]3 years ago
5 0

Answer:

3r + 2s + 8t + 15

Step-by-step explanation:

7r + 10 - 2(2r + 3s - 5t) + 2(4s - t) + 5

=  > 7r + 10 - 4r - 6s + 10t + 8s   -  2t + 5

=  > 7r - 4r + 8s - 6s + 10t - 2t + 10 + 5

=  > 3r + 2s + 8t + 15

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Trent told his friends it would take him 90 minutes to mow the lawn. It only took him
marta [7]

Answer:

The answer is 16%

Step-by-step explanation:

use the percent error formula.

\frac{|E-T|}{|T|} *100

in this problem,

e= 75

t=90

substitute and solve.

\frac{|75-90|}{|90|} *100\\\frac{|-15|}{|90|}*100\\\\ .16667*100\\

16%

we are dealing with percents so rounding to nearest whole number will suffice.

hope this helps!

7 0
4 years ago
¿Cuál de los siguientes puntos no pertenece a la función cuadrática f(x) = 1-x^2 ?
dusya [7]

Answer:

<h2>A. (0,1)</h2>

Step-by-step explanation:

The question lacks the e=required option. Find the complete question below with options.

Which of the following points does not belong to the quadratic function

f(x) = 1-x²?

a.(0,1) b.(1,0) c.(-1,0)

Let f(x) = 0

The equation becomes 1-x² = 0

Solving 1-x² = 0 for x;

subtract 1 from both sides;

1-x²-1 = 0-1

-x² = -1

multiply both sides by minus sign

-(-x²) = -(-1)

x² = 1

take square root of both sides;

√x² = ±√1

x = ±1

x = 1 and x = -1

when x = 1

f(x) = y = 1-1²

y = 1-1

y = 0

when x = -1

f(x) = y = 1-(-1)²

y = 1-1

y = 0

Hence the coordinate of the function f(x) = 1-x² are (±1, 0) i.e (1, 0) and (-1, 0). The point that does not belong to the quadratic function is (0, 1)

3 0
3 years ago
HELP ME PLEASE WALLAHI THIS SO HARDDDDDD
Andreas93 [3]

Answer:

OK SO I AM NOT SURE BUT I THINK THIS IS THE ANSWER!

ok so think u have to do 6 x 5= 30 and then do 30 divided by 3 which is 10. so think your answer is 10. again, i am not completely sure but I hope this helped!! <3  

(if this was correct please give brainliest!!)

5 0
3 years ago
Read 2 more answers
How can i multiply 9 x 475 using expanded form and distributive property
weeeeeb [17]
Expanded form: 9+400+70+5
idk distributive property sorry but I'm pretty sure you can't because in distributive, you need to have a parantheses or you could just factor but I don't think that's the case. 
4 0
3 years ago
Read 2 more answers
How can I explain how to make a 3.5 into a fraction for Mt 10yr old?
stealth61 [152]
The number on the left side of the decimal, write it as a large, in this case, three. The number on the right side of the decimal, write as a small number. Then put a ten under the five, and divide the two with a line. A way to remember this is - Imagine you have 3 cookies. The .5 represents a half of a cookie. You need to have all ten parts of the cookie to make a whole cookie. You'd need 5 more pieces of cookie to make 4 cookies. Hope this helps.
8 0
3 years ago
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