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kakasveta [241]
3 years ago
10

Need help with this question

Mathematics
1 answer:
slava [35]3 years ago
6 0
Domain is X values that is 1 and Range is Y values that is 3 <span />
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Parabolas y=−2x^2 and y=2x^2 +k intersect at points A and B that are in the third and the fourth quadrants respectively. Find k
OverLord2011 [107]

Answer:

-25  

Step-by-step explanation:

(1)   y = -2x²

(2) y =   2x² + k     Subtract (1) from (2)

    0 =  4x² + k      Subtract 4x² from each side

    k = -4x²

The parabolas are <em>symmetrical about the y-axis.</em>

Segment AB = 5, so x = +2.5 and x = +2.5.

k = -4(±2.5)² = -4 × 6.25 = -25

8 0
2 years ago
Explain how to use the distributive property to find an expression that is equivalent to 20+10
nordsb [41]

Answer: 2(10+5)

Step-by-step explanation: half of 20 is 10. half of 10 is five and i put them both in parentheses. outside the parenthesis i placed 2 so it is multiplied to the inner set of numbers.

5 0
3 years ago
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If f(x)=4x−7 what is f(−5)?<br><br> 1. 13<br> 2. -27<br> 3. -13<br> 4. 27
Xelga [282]

Answer:

option 2

Step-by-step explanation:

Substitute x = - 5 into f(x) , that is

f(- 5) = 4(- 5) - 7 = - 20 - 7 = - 27

3 0
2 years ago
Can some plz help me
alisha [4.7K]

Answer: red 36 m

Step-by-step explanation: base plus base = 18 / 2 = 9 * 4 = 36 m

3 0
3 years ago
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4 (j+17) -1 is greater than or equal to 19
Mars2501 [29]

4(j+17)-1\geq19\qquad\text{use distributive property}\\\\4j+68-1\geq19\\\\4j+67\geq19\qquad\text{subtract 67 from both sides}\\\\4j\geq-48\qquad\text{divide both sides by 4}\\\\j\geq-12

8 0
3 years ago
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