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skad [1K]
3 years ago
9

13. Solve –5√ x = –15. A. x = –9 B. x = –7 C. x = 9 D. x = 7

Mathematics
1 answer:
ddd [48]3 years ago
4 0

Domain:x\geq0\\\\-5\sqrt{x}=-15\qquad\text{divide both sides by (-5)}\\\\\sqrt{x}=3\to \boxed{x=9}\to\boxed{C.}

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Avery uses a blend of dark chocolate and milk chocolate to make the ice cream topping at her restaurant. She wants to buy 10 kg
Ksju [112]

Answer:

d = m + 10\\d+m=150

Step-by-step explanation:

If Avery wants the amount of dark chocolate (d) to be 10 kg higher than the amount of milk chocolate (m), then the following relationship must be true:

d = m + 10

If the total amount of chocolate must equal 150 kg, then:

d+m=150

The system of equations that represent this situation is:

d = m + 10\\d+m=150

5 0
3 years ago
Can someone help me???
cestrela7 [59]

Answer:

Cos (5π/3)

Cos (π/6)I think this one

7 0
3 years ago
Read 2 more answers
Please find the answer and show your work so I can learn thanks!!
irga5000 [103]

Answer:

22.34 {km}^{2}

Step-by-step explanation:

The area of a circle:

A = πr^{2}

The problem gives the diameter of a circle, which is equal to 2*r.

If 5 1/3 = 2*r, then the radius is (16/3)/2 = 8/3.

Plugging this into the area equation,

A = π*{{8/3}}^{2}

A = \frac{{64*π}}{9} or approximately 22.34 {km}^{2}

8 0
3 years ago
If (x + 7) is a factor of f(x), what is the value of f(-7)?
rewona [7]

Answer:

The answer is 0.

Step-by-step explanation:

Simply plug in -7 for x as they want to see what the value of the function is when x=-7.

You can then just add -7 and 7.

7 + -7 = 0

So the answer is 0

7 0
3 years ago
How much weight did he gain over the six week period?
kolezko [41]
Convert all to decimals
1/4=0.25
1/2=0.5 so

2 and 1/2=2.5
3=3
-1 and 1/4=-1.25
4 and 1/4=4.25
1 and 1/4=1.25
-1 and 1/2=-1.5
add all together
2.5+3-1.25+4.25+1.25-1.5=8.25=8 and 1/4


answer is 8 and 1/4
B is correct answer
(note, previous user's answer was correct, but had no work shown)
3 0
3 years ago
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