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2 years ago

PLS HELP WITH THIS!!!!!

Mathematics

1 answer:

Butoxors [25]2 years ago

4 0

Answer:

Step-by-step explanation:

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Solve by substitution <br> X^2= 2y + 10<br> 3x-y = 9

Viefleur [7K]

Answer:

$x=-4\\ x=-2\\ y=-21\\ y=-15$

Step-by-step explanation:

$x^{2} =2y+10$

$y=-9+3x$

$x^{2} =2(-9+3x)+10$

$x^{2} =-18+6x+10$

$x^{2} =6x-8$

$x^{2} -6x+8$

$x=-4, -2$

$y=-9+3(-4)$

$y=-9-12$

$y=-21$

$y=-9+3(-2)$

$y=-9-6$

$y=-15$

8 0

3 years ago

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The perimeter of a rectangle is 150 cm. the length is 4 cm greater than the width find the width and length

Fudgin [204]

Let's call the width of our rectangle $w$ and the length $l$ . We can say $l = w + 4$ , since the length is equal to 4 cm greater than the width.

Also remember that the perimeter of a rectangle is the sum of two times the width and two times the length, or $P = 2l + 2w$ . To solve this problem, we can substitute in the information we know, as shown below:

$150 = 2(w + 4) + 2w$

$150 = 4w + 8$

$142 = 4w$

$w = \frac{71}{2}$

Now, we can substitute in the width we found into the formula for length, which is $l = w + 4$ :

$l = \frac{71}{2} + 4$

$l = \frac{79}{2}$

The width of our rectangle is $\boxed{\frac{71}{2} \,\, \textrm{cm}}$ cm and the length of our rectangle is $\boxed{\frac{79}{2} \,\, \textrm{cm}}$

8 0

3 years ago

PLEASE HELP!!!!!! STATISTIC WORK!

aliya0001 [1]

Answer:hi i am breanna

Gun ownership was a significant predictor of firearm homicide rates ... not determine causation, we found that states with higher rates of gun ownership had ... of no multiyear studies of interstate variation in gun ownership and homicide rates ... it is feasible and useful to study the relationship between gun availability

Step-by-step explanation:

Several studies have examined the relationship between homicide victims .... no annual survey assessed the prevalence of household firearm ownership in ... identified as related to homicide rates and might also be related to firearm

6 0

3 years ago

(10-1)(10-2)(10-3)(10-10)

Goryan [66]

Answer:

Step-by-step explanation:

(10-1=9)(10-2=8)(10-3=7)(10-10=0)

9*8*7*0=0

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3 years ago

There are 10 marbles in a bag, and the marbles are either red or blue. Eric will randomly choose two marbles from the bag, witho

Vilka [71]

Number of red marbles in bag = r. b = 10-rProbability of first marble being red: r/10Second marble being red: (r-1)/9total probability = 2/15 = (r-1)*r/90r = 4b = 6

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3 years ago

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