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3 years ago

Evaluate (4x-5)² pls send answers

Mathematics

1 answer:

Natasha2012 [34]3 years ago

5 0

Answer =

= (4x - 5)²

= 16x² - 40x + 25

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X-Y-2Z =-11<br> X-2Y-Z = -11 <br> -X+Y+3Z = 14

Snowcat [4.5K]

9514 1404 393

Answer:

(X, Y, Z) = (-2, 3, 3)

Step-by-step explanation:

We can subtract the second equation from the first to get ...

Y -Z = 0

We can add the third equation to the first to get ...

Z = 3

Then ...

Y -3 = 0 ⇒ Y = 3

and ...

X -3 -2(3) = -11

X = -2 . . . . . . . . . add 9

The solution is ...

(X, Y, Z) = (-2, 3, 3)

7 0

2 years ago

Write in the simplest form.<br> -4/7 ÷ 8/9

RSB [31]

Answer:

-9/14

Step-by-step explanation:

5 0

2 years ago

Please please help me with those questions

Illusion [34]

Answer:

1. acute

2. obtuse

3. obtuse

4.reflex

5.acute

6. right

7. reflex

8. obtuse

9. reflex

10. straight

8 0

2 years ago

There are 14 boys and 9 girls in miss Keller’s music class what is the ratio of boys to girls ? And what is the ratio of girls t

11111nata11111 [884]

Answer:

Step-by-step explanation:

if there are 14 boys to 9 girls in a class the ratio would be

14:9

6 0

2 years ago

Read 2 more answers

By driving 8 mph faster than Bob, John can make a 230 mile trip in one half hour less. How fast does Bob drive on the trip? Roun

____ [38]

Answer: The speed of Bob is 56.8 km/hr.

Step-by-step explanation:

Let the speed of Bob be 'x'.

Let the speed of John be 'x-8'.

Distance covered = 230 miles

time = $1\dfrac{1}{2}=\dfrac{3}{2}\ hr$

According to question, we get that

$\dfrac{230}{x}-\dfrac{230}{x+8}=\dfrac{3}{2}\\\\230\dfrac{x+8-x}{x(x+8)}=\dfrac{3}{2}\\\\\dfrac{230\times 8}{x^2+8x}=\dfrac{3}{2}\\\\\dfrac{1840}{x^2+8x}=\dfrac{3}{2}\\\\1840\times 2=3x^2+24x\\\\3680=3x^2+24x\\\\3x^2+24x-3680=0\\\\x\approx 56.8\ km/hr$

Hence, the speed of Bob is 56.8 km/hr.

6 0

2 years ago

Evaluate (4x-5)² pls send answers ​

Evaluate (4x-5)² pls send answers