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8090 [49]
3 years ago
13

PLEASE HELP ME~! NEED THIS ASAP

Mathematics
1 answer:
BlackZzzverrR [31]3 years ago
8 0

Answer:

B

Step-by-step explanation:

since y and x vary directly the equation relating them is

y = kx ← k is the constant of variation

to find k use any ordered pair from the list given

using x = 4 when y = - 2, then

k = \frac{y}{x} = \frac{-2}{4} = - 0.5 → B


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What are the solutions to x2 + 8x + 7 =.b?
loris [4]

Answer:

x = 7 and x = -1

Step-by-step explanation:

First, we need to factor this quadratic.

To do this, start by finding all the factors of C.

7 x 1, -7 x -1

Now, we need to pick out the factors that add up to the b number, which is 8. That would be 7 and 1.

Now, we can use the numbers 7 and 1 to create two binomials.

( x + 7 ) ( x + 1 ) = 0

The last thing we need to do is to set those binomials to 0 and solve each of them individually.

x + 7 = 0

x = - 7

Solving the first binomial gives us our first solution, -7.

x + 1 = 0

x = -1

Solving the second one gives us our second solution, -1.

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4 0
3 years ago
WILL GIVE BRAINLIEST<br>What is the value of a in the problem 4a-3=D<br>explain answer
mixas84 [53]
In this case, you aren't going to get an integer for the value of a, but you can rearrange the equation to equal a.

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4 0
3 years ago
54*8+6+14= what's the answer
dybincka [34]
<span>54*8+6+14
Multiply 54 by 8
432 + 6 + 14
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</span>
5 0
3 years ago
Solve &amp; Explain your Math thinking 12-7
Tom [10]

For this case we have the following subtraction:

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We can rewrite the subtraction in an easier way.

We have then:

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4 0
3 years ago
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Setler [38]

Answer:

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Step-by-step explanation:

i just wanna help but im not very smart

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