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Svetradugi [14.3K]
3 years ago
9

Help me on number problem 5 please

Mathematics
2 answers:
Aleksandr-060686 [28]3 years ago
5 0

Answer:

x = 10

Step-by-step explanation:

If f(x) equals 3x-7 and also equals 23, then you can set 3x-7 equal to 23

3x - 7 = 23

3x = 30

x = 10

agasfer [191]3 years ago
3 0

Answer:


Step-by-step explanation:

x=10

3*10=30-7=23=f

i think

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Angle of a triangle measures 115° the other two angles are in the ratio of 4:9 what are the measures of those two angles
nasty-shy [4]

Answer:

20, 45

Step-by-step explanation:

A triangle has 180 degrees interior angle measure. One angle measure 115 so that means the other two angles  must add up to 65.

The remaning angles form a ratio of 4:9. This means we must split 65 into a ratio of. 4:9

A ratio partition parts of something. We can add the ratio intergers to find it full length.

4+9=13.

Divide 65/13=5.

Multiply 5x4 and 5x9 serpately.

We get 20 and 45

6 0
3 years ago
Can someone check my work?. 1. Simplify the given expression.. (7 − 3i) • (2 − i) . 4 + i (MY ANSWER) . . 14 + 3i . . 11 − 13i .
Annette [7]
1. (7 − 3i) • (2 − i)
It is simplified as follows:
14 - 7i  -6i - 3
11 - 13i

2. <span>(−5 + 3i) • (1 − 2i) 
</span><span>It is simplified as follows:
</span><span>-5 + 10i + 3i + 6
1 + 13i

3. (1 + 3i) + (2 − 5i) 
</span><span>It is simplified as follows:
</span>1 + 3i + 2 − 5i<span>
3 - 2i

4. (6 + 2i) − (8 − 3i) 
</span><span>It is simplified as follows:
</span><span>6 + 2i − 8 + 3i
</span>-2 + 5i
4 0
3 years ago
Solve the formula for converting temperature from degrees Celsius to degrees Fahrenheit for C.
bixtya [17]

F = 9/5C + 32

F - 32 = 9/5C

C = 5/9(F - 32)

Correct answer: A

Hope this helps! :)

3 0
2 years ago
If your phone Is on 100 percent battery, and you drain 45 percent of it, then charge 22 percent more, how much battery do you ha
baherus [9]
100-45+22= 77
you will have 77 percent of battery on your phone
5 0
3 years ago
PLEASE HELP 20+ POINTS!! What is the cosine equation of the function shown?
noname [10]

Answer:   \bold{y=7\ \cos\bigg(x-\dfrac{\pi}{4}\bigg)-4}

<u>Step-by-step explanation:</u>

y = A cos (Bx - C) + D

  • A (amplitude) = max - D
  • B = Period/2π  --->   Period is the distance from max to next max
  • C = B · Phase Shift  ---> Phase shift is distance from y-axis to max
  • D (vertical shift) = (max + min)/2

D = (max + min)/2     =     (3 - 11)/3      =  -4

A = max - D               =     3 - (-4)         = 7

Period = 9π/4 - π/4   =    8π/4            = 2π

B = Period/2π           =    2π/2π          = 1

Phase Shift = π/4 - 0 =     π/4

C = B · Phase Shift    =  1 · π/4            = π/4

Equation:

           y = 7 cos (1·x - π/4) + (-4)

               

8 0
3 years ago
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