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8_murik_8 [283]
3 years ago
8

Which of the following is true about the graph of f(x)=7^x

Mathematics
1 answer:
mote1985 [20]3 years ago
7 0
In the negatives the y starts at 0 but when x goes to zero, the y reaches to 1 and then increase exponentially by 7
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Please help me ASAP?!!
Blababa [14]

Answer:

(0,-5) and (-4,3)

Step-by-step explanation:

The given equations are

\left \{ {{x^2+y^2=25} \atop {2x+y=-5}} \right.

Make y the subject in the second equation;

y=-2x-5

Substitute into the first equation;

x^2+(-2x-5)^2=25

Expand:

x^2+4x^2+20x+25=25

x^2+4x^2+20x+25-25=0

5x^2+20x=0

5x(x+4)=0

\Rightarrow x=0,x=-4

When x=0,

y=-2(0)-5=-5

This gives; (0,-5)

When x=-4

y=-2(-4)-5=3

This gives (-4,3)

7 0
3 years ago
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what is the radius of a circle with a circumference of 125 cm? round your answer to the nearest whole number .use 3.14
Lerok [7]

Answer:

19.9 i think

Step-by-step explanation:

125/3.14=39.8

39.8/2=19.9

hope i helped

5 0
3 years ago
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Evaluate f(x)= 1.8 X 2^x for x=6 <br><br> A: 115.2<br><br> B: 2176.78<br><br> C: 21.6
attashe74 [19]
By substitution
f(6) = 1.8×2^(6)
= 1.8×64
= 115.2
3 0
3 years ago
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5 (3z-3) =30 it’s from delta math 8 grade
Mkey [24]

Answer:

5

Step-by-step explanation:

Substitute the value of the variable into the equation and simplify.

3 0
3 years ago
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If f(x)= 15x+7x and g(x)= x^2-5x, find (f+g)(x)
cupoosta [38]

Answer:

(f+g)(x) = x^2 +10x +7

Step-by-step explanation:

(f+g)(x) = f(x) +g(x) = (15x +7) +(x^2 -5x)

= x^2 +x(15 -5) +7

= x^2 +10x +7

7 0
3 years ago
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