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DanielleElmas [232]
3 years ago
14

F(x) = -22 + 5x + 15 Find f(9)​

Mathematics
1 answer:
zaharov [31]3 years ago
3 0

Answer:

sln

f(x) =-12+5x+15

x=9

f(9)=-12+5x9+15

f(9)=-12+45+15

f(9)=-12+60

f(9)=48

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13. Find the value of x.<br> 140°<br> 136°<br> х<br> 148°<br> 142°<br> 150°
garik1379 [7]

Answer:

sum of interior angle of heptagon is 900°.

140°+148°+136°+150°+142°+90°+x=900°

806+x=900°

x=900°-806°

x=94°

8 0
3 years ago
the width of a rectangle is the length minus 2 units. The area of the rectangle is48 units. What is the width, in units, of the
tatuchka [14]

Answer:

6

Step-by-step explanation:

put unknown as y

area of rectangle = width × long

y(y - 2)=48

y² -2y =48

u can use scientific calculator to find this

y²-2y-48=0

(y-8)(y+6)=0

y=8 y=-6

take the positive value and ignore the negative value

width=y-2 long=8

8-2=6

I hope this help you :)

6 0
3 years ago
Solving systems equations: substitution <br> y=6x+5<br> y=4x+5
Andreas93 [3]
6x + 5 = 4x + 5
2x + 5 = 5
2x = 0, x = 0
Y = 6(0) + 5, y = 5
Solution: x = 0, y = 5
8 0
3 years ago
Read 2 more answers
Harold earns $10.50 per hour working at a doctor's office. On Monday he spent 1 5/12 hours filing paperwork, 1 3/4 sending email
Lana71 [14]

Answer:

the total earnings is $58

Step-by-step explanation:

The computation of earnings is shown below:

= Time spent in filling paperwork + time spent in sending emails + time spent in making appointments

= (1 5 ÷ 12 × $10.50)  + (1 3 ÷ 4 × $10.50)  + (2 1 ÷ 3 × $10.50)

= 14.875 + 18.375 + 24.50

= $57.75

Hence, the total earnings is $58

The same is to be considered

6 0
2 years ago
Please help me with the last question
Greeley [361]
You'd solve this by creating the equation
20 + 6x - 1 + x + 14 = 180
33 + 7x = 180
- 33
7x = 147
÷ 7
x = 21
(because angles in a triangle add up to 180°)
And then you'd substitute in the value of x, so
6 × 21 = 126
126 - 1 = 125° = Angle A
21 + 14 = 35° = Angle C
I hope this helps!
7 0
3 years ago
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