Which phrase matches the algebraic expression below? 2(x - 7) +10

Mathematics

1 answer:

Ierofanga [76]2 years ago

5 0

Answer:

2 times the difference of x minus 7 plus 10

Step-by-step explanation:

When dealing with equations, you ALWAYS do the parentheses first. The first relationship x and 7 are going to have is being subtracted from eachother. Once you do that, you can do the rest of the equation. Hope this helps!

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What are the solutions to the equation x^2+14x=-130 please do a step by step

Serjik [45]

Answer:

The answer to your question is: x1 = - 7 + 9i x2 = -7 - 9i

Step-by-step explanation:

x² + 14x = - 130

x² + 14x + (7)² = -130 + (7)²

(x + 7)² = -81

x + 7 = ± √-81

i² = -1, then x + 7 = ±√ 81i²

x + 7 = ± 9i

x1 = -7 + 9i x2 = -7 - 9i

5 0

3 years ago

laurie uses 0.25 pounds of butter to make a batch of her grandmother's cookies. She needs to make 4.5 times ther ecipe for the s

Gnesinka [82]

Laurie must make 4.5 batches for the school bake sale, and 2 batches for her family. Therefore, in total, Laurie must make 4.5 + 2 = 6.5 batches of cookies.

Since each batch of cookies requires 0.25 pounds of butter, we can multiply that amount by the number of batches baked: 0.25 * 6.5 = 1.625 pounds of butter.

So Laurie uses 1.625 pounds of butter to make all the cookies.

6 0

3 years ago

A- 15 √11 B- 30 √22 C- 30 √11 D- 15 √22

ANTONII [103]

Answer:

Step-by-step explanation:

$3\sqrt{50} * \sqrt{22} \\3 \sqrt{50 * 22} \\3\sqrt{1100} \\3\sqrt{11 * 10 * 10}\\3*10\sqrt{11}\\30\sqrt{11}$