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3 years ago

Use the zero property to find the solutions to the equation X2 + X- 30 = 12

Mathematics

2 answers:

Katarina [22]3 years ago

8 0

Answer:

X=6, X=-7

Step-by-step explanation:

X^2+X-30=12

X^2+X-30-12=12-12-Subtract 12 from both sides

a=1 b=1 c=-30 - then place into the quadratic formula and you will get the answers.

katen-ka-za [31]3 years ago

4 0

Answer: 6 or-7

Step-by-step explanation:

X2+x-30=12

Collect like terms

X2+x-30-12=0

X2+x-42=0

Factorise

Factors of -42 that will give +x is +7&-6

Substitute

X2+7x-6x-42=0

X(x+7)-6(x+7)=0

(X-6)(x+7)=0

X-6=0

X=6 or

X+7=0

X= -7

Therefore x=6 or -7

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Answer:

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4 years ago

The radius of a circular field is 70 metres.

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Step-by-step explanation:

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3 years ago

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dybincka [34]

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So, y is the line which goes through the first and last points of the chart.

To proof that the rest of points go through the line as well, we will evalute each point

$\begin{gathered} f(-5)=-\frac{5}{4}\cdot(-5)-7=\frac{25}{4}-7=-\frac{3}{4}\ne-7 \\ f(-1)=-\frac{5}{4}(-1)-7=\frac{5}{4}-7=-\frac{23}{4}\ne-12 \end{gathered}$

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3 years ago

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ipn [44]

Answer:

D = n/5 - m^2

Step-by-step explanation:

work:

n = 5(m^2 + D)

distribute the 5

n = 5m^2 + 5D

move the 5 to the other side by subtracting from both sides

n - 5m^2 = 5D

Divide both sides by 5 to isolate D

n/5 -m^2 = D

use reflexive property to get the answer on the left side

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4 years ago

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