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Savatey [412]
3 years ago
6

The area of a rectangle is 70 square inches.

Mathematics
1 answer:
german3 years ago
7 0
The correct answer is A.

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What numbers multiply to -30 and add to -3
krek1111 [17]
Let the numbers be x and y.  Then xy = -30 and  x+y = -3.

Solve xy = -30 for y:    y = -30/x

subst. -30/x for y in   x+y= -3:     x  -  30/x = -3

Multiply all 3 terms by x:  x^2 - 30 = -3x, so   x^2 + 3x - 10 = 0

Solve this quadratic equation for x.     x: {-5, 2}

If x = -5, then   x+y = -3 becomes -5 + y = -3, and y = 2.

You should check to determine whether x=2 is also correct.  If it is, what is the corresponding y value?
3 0
3 years ago
a farmer uses 1/3 of his land to plant cassava 3/5 of the remaining land to plant Maize and the rest vegetables if vegetables co
Rzqust [24]

Answer:

37.5 acres.

Step-by-step explanation:

Fraction of his land  where vegetables are grown

= 1 - 1/3 - 2/3 *3/5

(after taking away 1/3 we get 2/3 and the farmer uses 3/5 of this 2/3 to grow Maize.

= 1 - 1/3 - 6/15              LCD of 3 and 15= 15  so we write:

= 1 - 5/15 - 6/15

= 1 - (5+6)/16

=  1 - 11/15

= 4/15.

4 /15 is equivalent to  10 acres

so  total  area (= 1)  =   10 / 4/15     Invert the 4/15 and multiply:

= 10 * 15/4

=  150/4

= 37.5 acres.

3 0
3 years ago
What is f(0) if f(t) = t^2 – 2t – 2?
Dafna11 [192]

Answer:

-2

Step-by-step explanation:

f(t) = t^2 – 2t – 2

To find f(0), replace t with 0 in the expression and evaluate the expression.

f(0) = 0^2 – 2(0) – 2

f(0) = -2

6 0
3 years ago
Read 2 more answers
PLZ hurry, 20 points for simple Q: Solve 5x + 1 = 2x2 + 9x.
iragen [17]
The answer is:
 
a: 1 = 2(x^2<span> + 2</span>x<span>) 
b:</span>1 = 2x^2 + 4<span>x
d:</span>3 = 2(x + 1)^2

you can tell these are your answer when you solve it.
Hope this helps!
8 0
3 years ago
Read 2 more answers
Cual es la ecuación de la recta vertical que pasa por (2,3)?
NeTakaya

Answer:

a

Step-by-step explanation:

6 0
3 years ago
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