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3 years ago

Can you guys let me know if I'm right please

Mathematics

1 answer:

MAXImum [283]3 years ago

3 0

Answer:

No there are problems. Please correct the errors

$1 \frac{3}{20} = \frac{23}{20} = 23:20$

$25\% = \frac{1}{4} = 0.25$

Step-by-step explanation:

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Select the correct answer. what is the solution set of y = x2 2x 7 and y = x 7? a. {(0, 7), (-1, 6)} b. {(0, 7), (-7, 0)} c. {(0

Kaylis [27]

Answer:

a. {(0, 7), (-1, 6)}

Step-by-step explanation:

$y = x^{2} +2x+7\\y=x+7$

subtract the equations

$y = x^{2} +2x+7 \\- \ \ \ \ \ y=x+7\\y - y =x^{2} +2x+7-(x+7)\\0=x^{2} +x\\x = 0 \ and \ x= -1$

for $y = x^{2} +2x+7$ , substitute x = 0

$y = (0)^{2} +2(0)+7\\y = 0 +0+7\\y=7$

for $y = x^{2} +2x+7$ , substitute x = 0

$y = (-1)^{2} +2(-1)+7\\y = 1 -2+7\\y=6$

6 0

1 year ago

A taxi travels 25 km east of airport. Then it travels from that point to a point that is 40 km west of the airport. Finally the

Marizza181 [45]

The answer is: " 95 km " .
__________________________________________________
Explanation:
__________________________________________________

 ("airport")
• {Step 1): " 25 km east " •
│===============================> │

• {Step 2): " 40 km west ["of that point"] " ; • │<==========================================│

 • {Step 3: [back to airport] = " (40 km − 25 km) " ;

 • ("airport").
│=======>│
 _________________________________________________

 Note: To find "total distance traveled:

" 40 km + (40 km) + (40 km − 25 km) " ;

= " 40 km + (40 km) + (15 km) " ;

= " 40 km + 40 km + (15 km) " ;

= 80 km + 15 km ;

= 95 km .
____________________________________________________

The answer is: " 95 km " .
____________________________________________________

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3 years ago

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