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Gemiola [76]
2 years ago
9

Can someone please help me solve this math problem? Thanks!

Mathematics
1 answer:
zalisa [80]2 years ago
4 0

Using a system of equations, it is found that the value of “b” in ax^2 + bx + c would be of:

B. 6

<h3>What is a system of equations?</h3>

A system of equations is when two or more variables are related, and equations are built to find the values of each variable.

In this problem, when x = 0, y = 15, hence c = 15.

When x = -1, y = 10, hence:

a - b + 15 = 10

a - b = -5

a = b - 5.

Then, when x = 1, y = 22, hence:

a + b + 15 = 22

a + b = 7

b - 5 + b = 7

2b = 12

b = 6.

Hence option b is correct.

More can be learned about a system of equations at brainly.com/question/24342899

#SPJ1

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Evaluate the expression -7 1/4x + 3 5/8 for x= -4
Misha Larkins [42]

Answer:

32 5/8 (or 32 and 5/8)

Step-by-step explanation:

Okay, so this problem is asking for us to solve this problem with the substitution of a variable: x = -4. Before we fully solve this problem, we need to replace all of those x variables with -4 so that it is easier to solve.

-7 1/4(-4) + 3 5/8.

To make this problem even easier to solve, let's turn these mixed numbers into improper fractions. To do this, multiply the denominator by the whole number. Then add the numerator to this number. The new number that you just got is now your new numerator for this number.

-29/4(-4) + 3 5/8.

Repeat the last step to turn the other mixed number into an improper fraction.

-29/4(-4) + 29/8.

Now let's multiply that -4 by 29/4. Because a whole number technically has a denominator of 1, we can now set up the next part of our problem. (The symbol * means multiplication since we can't use x since it is already being used as a variable in this equation.)

(-29/4 * -4/1) + 29/8.

29 + 29/8.

Now to solve the rest of this problem, let's convert the whole number of 29 so that it has a denominator of 8. This is that these two numbers are addable.

<u>29</u> x <u>8</u> = <u>232</u>

1   x 8 =   8

Now these numbers are addable. So:

232/8 + 29/8 = 261/8 = 32 5/8.

I hope that this helps.

4 0
3 years ago
At 3:00 pm the temperature in Pittsburgh was 93 degrees Fahrenheit decreased at a rate of 2 degrees Fahrenheit every 30 minutes.
elixir [45]
The answer is 76 degrees
3 0
3 years ago
What is the answer plz show your work <br> 5(k-2)-8k=-34
Rina8888 [55]
Let's solve your equation step by step.

5(k - 2) - 8k= -34

Step 1: Simplify both sides of the equation.

5(k - 2) - 8k= -34

(5)(k) = (5)(-2) + - 8k= -34 (Distribute)

5k + -10 + -8k = -34

(5k + -8k) + (-10) = -34 (Combine Like Terms)

-3k + -10 = -34

-3k - 10 = -34

Step 2: Add 10 to both sides.

-3k - 10 + 10 = -34 + 10

-3k = -24

Step 3: Divide both sides by -3.

-3k\3 =-24\-3

K= 8

Answer:
K=8

Hope this helps


7 0
4 years ago
Read 2 more answers
It takes you 0.8 of a minute to read each page of your health book. It takes you 5.5 minutes to take the test at the end. How lo
jonny [76]
0.8*6.25+5.5=10.5 minutes
6 0
3 years ago
A company fills a warehouse will two types of goods A and B . they both come in tall boxes which cannot be stocked. one box of A
inessss [21]

Answer:

(1/2) * A + (1/2) * B <= 100; for A => 50; for B => 20

(5000) * A + (30000) * B <= 1500000; for A => 50; for B => 20

Step-by-step explanation:

There are two inequalities in mind, the first of the surface and the second of the price. Always bearing in mind that the minimum are 50 of A and 20 of B.

The first

A occupies 1/2 m and B occupies 1/2 m of surface, and the limit is 100 m of surface. Thus:

(1/2) * A + (1/2) * B <= 100; for A => 50; for B => 20

The second:

A costs 5,000 and B costs 30,000, and the limit is 1,500,000. Therefore:

(5000) * A + (30000) * B <= 1500000; for A => 50; for B => 20

5 0
3 years ago
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