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Salsk061 [2.6K]
3 years ago
12

How do you solve 7x-2=x²-10? Can you show the steps please :)

Mathematics
1 answer:
nekit [7.7K]3 years ago
8 0

Answer: x=−1 or x=8

Step-by-step explanation: 7x−2=x2−10

Learn how to solve quadratic equations

Khan Academy Video: Solving a quadratic by factoring

Khan Academy Video: Quadratic Formula 1

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Which equation does not represent a direct variation?
tatuchka [14]
Okay I think there has been a transcription issue here because it appears to me there are two answers. However I can spot where some brackets might be missing, bear with me on that.

A direct variation, a phrase I haven't heard before, sounds a lot like a direct proportion, something I am familiar with. A direct proportion satisfies two criteria:

The gradient of the function is constant s the independent variable (x) varies

The graph passes through the origin. That is to say when x = 0, y = 0.

Looking at these graphs, two can immediately be ruled out. Clearly A and D pass through the origin, and the gradient is constant because they are linear functions, so they are direct variations.

This leaves B and C. The graph of 1/x does not have a constant gradient, so any stretch of this graph (to y = k/x for some constant k) will similarly not be direct variation. Indeed there is a special name for this function, inverse proportion/variation. It appears both B and C are inverse proportion, however if I interpret B as y = (2/5)x instead, it is actually linear.

This leaves C as the odd one out.

I hope this helps you :)
4 0
4 years ago
What 34.1 divided equals 22
Artyom0805 [142]
34.1 ÷ __ = 22
So lets think if we wanna find the missing number we have to divide 34.1 and 22 to get 1.55
So, the final answer is
34.1 ÷ 1.55 = 22
I hope this has helped!
6 0
3 years ago
Read 2 more answers
Caleb went to Kroger and spent $83.47 on groceries. He had a coupon for $1.99 off bottled water and $0.89 off organic strawberri
Dmitry_Shevchenko [17]

Answer:

$86.35

Step-by-step explanation:

Total amount he spent at Kroger

= $83.47 on groceries. +coupon for $1.99 off bottled water + $0.89 off organic strawberries

= 83.47+0.89+1.99

= $86.35

5 0
3 years ago
What is the distance, in units, between (3, -5) and (8, 7) in the coordinate plane?
Rufina [12.5K]
Yes, 13 is correct
If you draw the right triangle, the two legs will be 5 and 12.
5 and 12 are parts of a Pythagorean triple. 13 completes the triplet.
4 0
3 years ago
In the following equation, when x=3, what is the value of y? -4x + 3y = 12
deff fn [24]

Answer:

y = 8

Step-by-step explanation:

-4(3) = -12

to get -12 to 12 you need to add 24 to -12 to make it 12.

so 3 (8) = 24

so -12 + 24 =12

4 0
3 years ago
Read 2 more answers
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