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4 years ago

15

Please help I’m struggling

1 answer:

IgorC [24]4 years ago

5 0

Answer: Factors of 13: 1, 13. Factors of 14: 1, 2, 7, 14. Factors of 15: 1, 3, 5, 15.

Step-by-step explanation:

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Evaluate the expression below when y = -3.

Rudik [331]

Start with the given equation:
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Substitute known values:
$2(-3)+7$
Evaluate:
$-6+7=1$

Similarly:
$-4y-10$
$-4(-3)-10$
$12-10=2$

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3 years ago

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3 years ago

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Scale model of skyscraper is 4.2 feet tall. When finished, skyscraper will be 525 meters tall. What scale was used to make model

bazaltina [42]

Answer:

1 : 140

Step-by-step explanation:

The scale used to make the model of height 4.2 feet = 1.28016m of a skyscraper (a very tall building) of height 525m is given as:

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8 0

4 years ago

Use the quadratic formula to find the solution to the question <br> 3x^2-10x+5=0

nlexa [21]

Answer:

$x_{1} =$ $\frac{5 + \sqrt{10} }{3}$ and $x_{2} =$ $\frac{5 - \sqrt{10} }{3}$

Step-by-step explanation:

3x^2-10x+5=0

$x_{1}$ = $\frac{10 + \sqrt{10^{2}-4*3*5 } }{2*3}$ $x_{2} =$ $\frac{10 - \sqrt{10^{2}-4*3*5 } }{2*3}$

$x_{1} =$ $\frac{10 + \sqrt{100-60} }{6}$ $x_{2} =$ $\frac{10 - \sqrt{100-60} }{6}$

$x_{1} =$ $\frac{10 + \sqrt{40} }{6}$ $x_{2} =$ $\frac{10 - \sqrt{40} }{6}$

$x_{1} =$ $\frac{10 + 2\sqrt{10} }{6}$ / 2 $x_{2} =$ $\frac{10 - 2\sqrt{10} }{6}$ / 2

$x_{1} =$ $\frac{5 + \sqrt{10} }{3}$ $x_{2} =$ $\frac{5 - \sqrt{10} }{3}$

3 0

3 years ago