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OLga [1]
3 years ago
12

Solve for r. –10r = 4 − 9r

Mathematics
2 answers:
weeeeeb [17]3 years ago
5 0
The answer to the variable r is r=-4
Eduardwww [97]3 years ago
3 0

Answer:

r = -4

Step-by-step explanation:

–10r = 4 − 9r

Add 9r to each side

–10r+9r = 4 − 9r+9r

-r = 4

Multiply each side by -1

-1 *-r = 4 *-1

r = -4

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Henry was building a tent and had four spikes that he had to pound into the ground. The net of one of the spikes is shown. What
Nikitich [7]
First one is B 
and the second is C
8 0
3 years ago
Read 2 more answers
A parabola is represented by the equation y2 = 5x. which equation represents the directrix?
ivann1987 [24]

The value of the directrix is -5/4.

According to the statement

we have given that the equation of parabola is y2 = 5x. And we have to find that the which equation represents the directrix.

We know that the general equation of parabola is

(y - k)2 = 4a(x - h)  -(1)

and given parabola equation is

y2 = 5x.  -(2)

After comparing the both equations we get k=0 and h=0

And the formula to find the directrix is

x = h - a

Substitute the values of h and a in it then

x = 0-5/4

x = -5/4.

Here the directrix is -5/4.

So, The value of the directrix is -5/4.

Learn more about the Parabola here brainly.com/question/4061870

#SPJ4

7 0
2 years ago
HURRY NEED HELP NOW 42 POINTS NEED 1 PARAGRAPH FOR EACH QUESTION there are 2 photos I put up and that where the questions are.
Shtirlitz [24]
1. All you have to do to find the area of the figure. IS first find the area of the rectangle. This is easy because all you have to do is base times height. 

22 x 17 =  374

Now to find the area of the triangle all you have to do is  do base times height like a rectangle, but then divide it by 2 afterwords.
19 x 12 = 228 ÷ 2  = 114.

Now add the two area's together:

374 + 114 = 488.

Just do the same with the one below, I've altered the pic a bit to make it easier. 



4 0
3 years ago
tom took a trip of 1,020 miles. he traveled by train at 55 miles an hour and the same number of hours by plane at 285mph how man
Kamila [148]
D = vt

Distance traveled by train
d = 55t
Distance traveled by plane
d = 285t
Total distance
d = 1020

So, you do:
distance traveled by plane + distance traveled by train =  total distance
(55t) + (285t) = 1020

Solve for t
t = 3 hours

t is the time traveled by each so 3 hrs traveled by train and 3 hrs traveled by plane

Total time  = 3 + 3 = 6 hours







8 0
3 years ago
Please answeeeeeeer!!!
Troyanec [42]
Your answer is 20

As isosceles triangle has two angles similar

And sum of all angles is 180,
so

80 + 80 = 160
and
180 - 160 is
20
So ur answer is 20
♥
5 0
4 years ago
Read 2 more answers
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