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Yanka [14]
3 years ago
9

Simplify this expression. Enter your answers in the boxes. 8.9 – 1.4x + (–6.5x) + 3.4

Mathematics
2 answers:
densk [106]3 years ago
5 0

Answer:

12.3-7.9x

Step-by-step explanation:

8.9+3.4=12.3

-1.4x+(-6.5x)=-7.9x

nexus9112 [7]3 years ago
5 0

Answer:

-7.9x+12.3

Step-by-step explanation:

8.9 – 1.4x + (–6.5x) + 3.4

Combine like terms

– 1.4x + (–6.5x)     + 3.4+8.9

-7.9x                           +12.3

-7.9x+12.3

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3^x+1 +3^x-1=270<br>Solve for x​
BaLLatris [955]

Answer:

x=4.464974

Step-by-step explanation:

5 0
3 years ago
Math graph equation. <br> (Picture.)
vladimir1956 [14]

Answer:

y = -2x + 3 is the required equation

Step-by-step explanation:

From the graph we will get two ordered pairs

If we see that When x=0 then y=3  and when x = 1 then  y=1

Now from this we can find the slope of the Graph

So slope of graph = (y2 - y1) / (x2-x1)

                               =(1-3) / (1-0)

                                =-2

So

Slope = m = -2

Now the equation is

y = mx + b

We have to find the value of b

as we have two ordered pairs we can take any of it to find the value of b because line passes through those points

taking (0,3) as a point

y= mx + b

put values

3 = -2*(0) + b

so

b=3


Now the equation of the line in this form is

y = mx + b

which is

y = -2x + 3

5 0
3 years ago
What is the value of a, b, and c in the quadratic equation -2x^2+4x-3=0
amm1812
A = -2
b = 4
c = -3

They are the coefficients to the terms in the equation<span />
6 0
3 years ago
Read 2 more answers
Find c and round to the nearest tenth. thank you in advance
PSYCHO15rus [73]

Answer and Step-by-step explanation:

90ft = a

55ft = b

50ft = c

Plug into equation.

50^{2}  = 90^{2}  + 55^{2}  - 2(90)(55)cosC\\\\2500 = 11125 - 9900(cosC)\\\\-8625 = -9900(cosC)\\\\0.8712 = cosC\\\\cos^{-1} (0.8712) = C\\\\29.4

29.4° is the answer.

4 0
3 years ago
Please help!! I don't know what to do :(
elena55 [62]

Yo sup??

This question can be solved by applying the properties of similar triangles

the triangle with sides 5x and 20 is similar to the triangle with sides 45 and 36

therefore we can say

5x/45=20/36

x=5 units

Hope this helps

8 0
3 years ago
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