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Mathematics

1 answer:

stealth61 [152]4 years ago

8 0

Multiply 3 with 7.
3 * 7 = 21
The value of the gift card changed by -$21 dollars.

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What the number is ؟

zubka84 [21]

Answer:

A number is a mathematical object used to count, measure and also label. The original examples are the natural numbers 1, 2, 3, 4 and so forth. A notational symbol that represents a number is called a numeral.

5 0

3 years ago

Help needed plaese✌

monitta

5x-3=2.5x+x solve this equation that I just gave you for X then plug it in to 2.5x and that will equal MN

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3 years ago

Find the angle between the vectors u=i-9j and v=8i+5j

Katyanochek1 [597]

Answer: $\cos^{-1} \left(\frac{-37}{\sqrt{7298}} \right) \approx 115.665^{\circ}$

Step-by-step explanation:

$u \cdot v=(1)(8)+(-9)(5)=-37\\\\|u|=\sqrt{1^{2}+(-9)^{2}}=\sqrt{82}\\\\|v|=\sqrt{8^{2}+5^{2}}=\sqrt{89}\\\\\cos \theta=\frac{-37}{\sqrt{82}\sqrt{89}}\\\\\theta=\cos^{-1} \left(\frac{-37}{\sqrt{82}\sqrt{89}} \right)\\\\\theta=\boxed{\cos^{-1} \left(\frac{-37}{\sqrt{7298}} \right) \approx 115.665^{\circ}}$

7 0

2 years ago

What would be the equation and how can I solve it

Blababa [14]

If alonzo is x then the equation is

x + (x +3) + 2(x + 3) = 57

Which equals

x + x + 3 + 2x + 6 = 57
4x + 9 = 57
4x = 48
x = 12

This means alonzo is 12 years old and alexis is 3 years older so alexis is 15 years old

Answer = 15 years old

5 0

3 years ago

Read 2 more answers

Please help it’s either C or A I’m pretty sure! Please help :(

AlexFokin [52]

I can’t see the photo send photo and maybe I can help

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3 years ago