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3 years ago

Please help me with this homework

Mathematics

1 answer:

lianna [129]3 years ago

8 0

Answer:

The third one

y+1=-2(x-3)

Step-by-step explanation:

Solve y+1=-2(x-3)

y+1=-2(x-3) becomes y=-2x+5

Then just graph it.

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Write a quadratic equation in standard form.

Naya [18.7K]

Answer:

1. x^2 +2x -24 = 0

2. x^2 -7x +10 = 0

Step-by-step explanation:

If you look at the factored and expanded forms of a quadratic with solutions p and q, you see ...

(x -p)(x -q) = x^2 -(p+q) +pq

The x-term coefficient is the opposite of the sum of solutions.

The constant is the product of solutions.

This knowledge lets you write down the standard form equation with no particular effort.

1. x^2 +2x -24 = 0

2. x^2 -7x +10 = 0

5 0

2 years ago

What is 4 minus 1 5/12

klasskru [66]

Answer: 2 and 7/12

Step-by-step explanation: To subtract 4 - 1 and 5/12, first subtract the fractions. Since 4 has no fraction, imagine the fraction 0/12.

Notice however that we can't subtract 0/12 - 5/12.

So, let's rewrite 4 and 0/12 as 3 + 1 and 0/12 or 3 + 12/12 by changing 1 and 0/12 into an improper fraction.

Now we have 3 and 12/12 - 1 and 5/12.

Now we can subtract our fractions 12/12 - 5/12 and we get 7/12. Next we subtract our whole numbers 4 - 1 to get 3.

So 5 - 1 and 5/12 is 2 and 7/12.

4 0

3 years ago

Read 2 more answers

Between them, John and Mark have 32 marbles. John has 3 times as many as Mark. How many marbles does each boy have?

Sauron [17]

Mark has 32 marbles and John has 96 marbles. If you add the marbles together they both have a total of 128.

8 0

3 years ago

Read 2 more answers

6. Trail Bike Rentals charges a $16 fixed fee plus $8 per hour for renting a bike. Matt paid $72

Naddik [55]

Answer:

7 hours

Step-by-step explanation:

The total amount is the flat fee plus the amount per hour times the number of hours

16 + 8h = 72

Subtract 16 from each side

16+8h-16 = 72 -16

8h = 56

Divide by 8

8h/8 = 56/8

h = 7

7 hours

7 0

3 years ago

Read 2 more answers

The sum of three numbers is 54. The third number is 6 more than the first. The second number is 2 times the third. What are the

77julia77 [94]

Answer:

9, 30, and 15.

Step-by-step explanation:

Let the three numbers be a, b, and c.

The sum of them is 54. So:

$a+b+c=54$

The third number is 6 more than the first. In other words, c=a+6.

The second number is twice the third. In other words, b=2c.

Let’s write the second number in terms of a. Since b=2c, this means that b=2(a+6).

Let’s substitute them into our equation. So:

$a+2(a+6)+(a+6)=54$

Solve for a. Distribute:

$a+2a+12+a+6=54$

Combine like terms:

$4a+18=54$

Subtract 18 from both sides:

$4a=36$

Hence, the value of a is:

$a=9$

So, the first number is 9.

The third number is 6 more than the first, so the third number is 15.

The second number is twice the third. So, the second number is 30.

Therefore, our numbers are:

9, 30, and 15.

3 0

2 years ago