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3 years ago

What is the y-value in the solution to this system of linear equations?

Mathematics

1 answer:

Romashka [77]3 years ago

4 0

Answer:

-4

Step-by-step explanation:

cause 4x4 = 16 and 4+5 =o so you could use four in each one right

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50 POINTS 10 QUESTIONS! Solve each quadratic equation using factoring PLEASE HELP!!

Tanzania [10]

Answer:

Quadratic Equation | Factoring

Solve each quadratic equation using factoring.

1) v² + 5v + 6 = 0

doing middle term factorisation

v²+(3+2)v+6=0

v²+3v+2v+6=0

v(v+3)+2(v+3)=0

(v+3)(v+2)=0

either

v=-3

or

v=-2

2) g² - 3g = 4

keeping all terms in one side

g²-3g-4=0

doing middle term factorisation

g²-(4-1)g-4=0

g²-4g+g-4=0

g(g-4)+1(g-4)=0

(g-4)(g+1)=0

either

g=4

or

g=-1

3)w² + 4w = 0

w(w+4)=0

either

w=0

or

w=-4

4) s² - 8s + 12 = 0

doing middle term factorisation

s²-(6+2)+12=0

s²-6s-2s+12=0

s(s-6)-2(s-6)=0

(s-6)(s-2)=0

either

s=6

or

s=2

5) x ²+ 2x - 35 = 0

doing middle term factorisation

x²+(7-5)x-35=0

x²+7x-5x-35=0

x(x+7)-5(x+7)=0

(x+7)(x-5)=0

either

x=-7

or

x=5

6) r(r + 2) = 99

opening bracket

r²+2r=99

keeping all terms in one side

r²+2r-99=0

r²+(11-9)r-99=0

r²+11r-9r-99=0

r(r+11)-9(r+11)=0

(r+11)(r-9)=0

either

r=-11

or

r=9

7)k(k-4)=-3

opening bracket

k²-4k=-3

keeping all terms in one side

k²-4k+3=0

k²-(3+1)k+3=0

k²-3k-k+3=0

k(k-3)-1(k-3)=0

(k-3)(k-1)=0

either

k=3

k=1

8)t²+ 3t + 2 = 0

doing middle term factorisation

t²+(2+1)t+2=0

t²+2t+t+2=0

t(t+2)+1(t+2)=0

(t+2)(t+1)=0

either

t=-2

or

t=-1

9)m ^ 2 - 81 = 0

m²=81

doing square root in both side

$\sqrt{m²}=\sqrt{9²}$

m=±9

either

m=9

or

m=-9

10) h²- 17h + 70 = 0

doing middle term factorisation

h²-(10+7)h+70=0

h²-10h-7h+70=0

h(h-10)-7(h-10)=0

(h-10)(h-7)=0

either

h=10

or

h=7

6 0

3 years ago

Read 2 more answers

1.25 * 10-3* 8 * 10-5

Lunna [17]

Answer:

350

Step-by-step explanation:

1.25*7*8*5=

8 0

3 years ago

claudia is making a gelatin desseert for a party.She plans on making 12 servings for every 5 people.If each pan claudia uses to

Ivenika [448]

3 pans. If she wants 12 servings for every 5 people and there are 10 people coming then she will need 24 servings. 24 divided by 8 is 3.

8 0

3 years ago

Which set of ordered pairs represents a function?

polet [3.4K]

C because the x coordinate cannot repeat in a function. One x coordinate can go into multiple y coordinates though.

Hope it helps

7 0

3 years ago

Unit rate for 320 yards in 8 minutes

Natalija [7]

Answer:

40 yards per minute

Step-by-step explanation:

you write out 320 yards/8 minutes. you write it as a fraction (320 yeards over 8 minutes). you want to find the number of yards per minute. to do that you want to make 8 minutes 1 minute. so you do 8 divided by 8. 8 divided by 8 equals one. what you do to the bottem of a fraction you do to the top and vice versa. so you do 320 divided by 8 and get one. you want to write your answer as a fraction so as 40 yards/1 minute (40 yards over 1 minute). always use units because teachers dock points if you don't.

STEP BY STEP SIMPLIFIED

rewrite problem
divide 8 by 8 to get 1 minute
divide 320 by 8 to get 40 yards

7 0

3 years ago