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Ivahew [28]
3 years ago
13

Complete each statement with a number that makes the statement true. A._____ < 7°c. B.___<-3°c. C.-0.8°c <_____ < -0

.1°c. D._____ > -2°c
Mathematics
1 answer:
IrinaVladis [17]3 years ago
5 0

A. 6c

B. -5c

C. -0.7c

D. 2c

Just a few you could use.

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1. How many real solutions does the quadratic equation x?+9x= -8 have?​
likoan [24]

Answer:

This quadratic equation has 2 solutions.

Step-by-step explanation:

I assume the '?' in your question is meant to be power 2 (²), or else it would not be a quadratic equation. You could write it using the superscript version of 2.

We can solve this equation by expressing it in the form: ax² + bx + c

x² + 9x= -8

x² + 9x + 8 = 0

Now if you know the discriminant, you can simply plug in your values of a, b, and c to see how many solutions there are.

In this case, you would not need the discriminant as there are whole-number factors and hence this can simply be factorised.

x² + 9x + 8 = 0

(x + 8)(x + 1) = 0

For this equation to be true (= 0), x can equal -8 OR -1.

Hence, this quadratic equation has 2 solutions.

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2 years ago
Hi can someone please help me with this question
olga2289 [7]

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tom's pencil is longer than Ellen's pencil:

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Step-by-step explanation:

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