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2 years ago

Solve for x Enter the solutions from least to greatest. -4x^2– 7 = -11

Mathematics

1 answer:

Pavlova-9 [17]2 years ago

3 0

Answer:

x = 1, x = -1

Step-by-step explanation:

-4x² = -4

x² = 1

x = $\sqrt{1}$

x = ±1

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Triangles-- find the M<ECD if ABC angels are 31 degress. picture added

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Answer:

Step-by-step explanation:

180° - 2 × 31° = 118° is measure of an angle which is vertical to ∠ECD ⇒

m∠ECD = 118°

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2 years ago

Moe and Larry each need to raise $200 to go on a trip with their school band.

svlad2 [7]

Moe Larry

35 + 20x 60 + 10x

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Moe and Larry will have the same amount of money in their savings accounts after 2.5 weeks.

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2 years ago

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Feliz [49]

Answer:

Step-by-step explanation:

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2 years ago

Factor the polynomial x2 + 18x + 81 as the product of two binomials

hram777 [196]

Answer:

$(x+9)^2$

Step-by-step explanation:

We have the polynomial x^2 + 18x + 81 and are being asked to factor this into two binomials.

A rule that I follow is what two numbers multiplied make c (in this case 81) and when added make b (in this case is 18).

So what two numbers when :

A. Multiplied make 81

B. Added make 18

This would be 9.

Now that we have the answer, we can put it into binomials.

(x + 9)(x + 9)

Since these are the same, we can combine it and make it into one.

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2 years ago

Jon is paid $20 to mow his neighbor's yard. It takes three hours to mow and $2 worth of gasoline. How much does Jon earn per hou

noname [10]

Jon earns 6 dollars per hour.

We know this because, if he gets paid $20 and buys $2 worth of gasoline, his profit is $18.

Then, we divide 18 by the number of hours he worked, 3, and thus, Jon earns $6/hr.

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2 years ago