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3 years ago

19 in2 17 in2 12 in2 22 in2

Mathematics

1 answer:

Morgarella [4.7K]3 years ago

8 0

Answer:22in2

Step-by-step explanation:

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Help me please with this

Elis [28]

Answer:

$155.43 in^3$

Step-by-step explanation:

base*hight

$=> \pi r^2 = 3^2*\pi =9*3.14=28.26$

$=> B*H=28.26*5.5=155.43\\$

5 0

3 years ago

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3/25 converted to a decimal

Yakvenalex [24]

Answer:

.12

Step-by-step explanation:

First set up your proportion.

$\frac{3}{25} = \frac{12}{100}$ Multiply 3 and 25 by 4 to get 12 and 100.

the answer would be 12 hundredths or .12

8 0

3 years ago

3) x2+ y2 - x + 3y - 42 = 0 X+y=4

REY [17]

The solution is $(-1,5)$ and $(7,-3)$

Step-by-step explanation:

The expression is $x^{2} +y^{2} -x+3y-42=0$ and $x+y=4$

Using substitution method we can solve the expression.

Let us substitute $x=4-y$ in $x^{2} +y^{2} -x+3y-42=0$

$(4-y)^{2} +y^{2} -(4-y)+3y-42=0$

Expanding and simplifying the expression, we get,

$\begin{array}{r}{16-8 y+y^{2}+y^{2}-4+y+3 y-42=0} \\{2 y^{2}-4 y-30=0}\end{array}$

Let us use the quadratic equation formula to solve this equation,

$\begin{aligned}y &=\frac{4 \pm \sqrt{16-4(2)(-30)}}{2(2)} \\&=\frac{4 \pm \sqrt{16+240}}{4} \\&=\frac{4 \pm 16}{4} \\y &=1 \pm 4\end{aligned}$

Thus, $y=5$ and $y=-3$

Substituting y-values in the equation $x+y=4$ , we get the value of x.

For $y=5$ ⇒ $x=4-5=-1$

For $y=-3$ ⇒ $x=4+3=7$

Thus, the solution set is $(-1,5)$ and $(7,-3)$

7 0

4 years ago

What goes in the missing space

Charra [1.4K]

Answer:

Step-by-step explanation:

When we factor (7x + 6) (x + 1), we would go back to

7x² + 13x + 6

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Have a great summer :)

4 0

3 years ago

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Please help me A? B? C? D?

MrMuchimi

Answer:

Step-by-step explanation:

4 0

3 years ago

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