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3 years ago

Evaluate the following using identity

Mathematics

1 answer:

Firdavs [7]3 years ago

5 0

Answer:

refer to the picture attached for steps

hope it helps

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(-7)(-9)=<br> please help i thought it was -63

riadik2000 [5.3K]

It’s 63 not -63 negative x negative is positive like if you hate to hate you love which is positive

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3 years ago

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The equipment elevator descends 4 feet per second. The elevator for the miners descends 17 feet per second. The equipment elevat

Ymorist [56]

Answer:

Kindly check explanation

Step-by-step explanation:

Given that :

Equipment elevator Descent = 4 fts per Second

Miners elevator descent = 17 ft/sec

Miner's elevator begins descent 25 seconds after equipment elevator :

Elevation after another 12 seconds :

Descent = (speed * time)

Equipment elevator = 4 * (25 + 12) = 148 ft descent

Miner's elevator = 17 * 12 = 204 ft descent

The Miner's elevator is deeper at 204 feets.

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4 years ago

Mrs.Cooper has $20. Can she buy a museum ticket for her 10-year-old daughter, a ticket for herself, and a book that cost $3.99?

salantis [7]

How much do museum tickets cost?

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4 years ago

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Donnie deli man delivered 595 box lunches for the robotics convention. There were 20 more turkey sandwiches then roast beef. The

Vinil7 [7]

Answer:

250 turkey sandwiches were delivered.

There were 230 roast beef delivered.

115 PB&J were delivered.

Step-by-step explanation:

This question is solved using a system of equations.

I am going to say that:

x is the number of turkey sandwiches.

y is the number of roast beef.

z is the number of PB&J.

Donnie delivered 595 box lunches

This means that $x + y + z = 595$

There were 20 more turkey sandwiches then roast beef.

This means that $x = y + 20$

There were twice as many roast beef has PB&J.

This means that $y = 2z$ .

So in the second equation, we have that $x = 2z + 20$

Replacing this in the first equation:

$x + y + z = 595$

$2z + 20 + 2z + z = 595$

$5z = 575$

$z = \frac{575}{5}$

$z = 115$

115 PB&J were delivered.

$x = 2z + 20 = 2*115 + 20 = 250$

250 turkey sandwiches were delivered.

$x = y + 20$

$y = x - 20 = 250 - 20 = 230$

There were 230 roast beef delivered.

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4 years ago

On an architects blueprint, 1 inch corresponds to 4 feet. Find the length of a wall represented by a line that is 3 7/8 inches l

andrew-mc [135]

15.5 feet is the answer

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4 years ago