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3 years ago

What is the first step in solving the quadratic equation -5x2+8=133

Mathematics

1 answer:

astraxan [27]3 years ago

4 0

I don’t think you can solve by using quadratic equation

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Find the surface area of a sphere with a diameter of 34 meters

Aliun [14]

if its diameter is 34, then its radius is half that or 17.

$\textit{surface area of a sphere}\\\\ SA=4\pi r^2 ~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ r=17 \end{cases}\implies \begin{array}{llll} SA=4\pi (17)^2\implies SA=1156\pi \\\\\\ SA\approx 3631.68~m^2 \end{array}$

4 0

2 years ago

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If you deposit 1000 in a savings account with an intrest rate of r compounded annually then the balance in the account after 3 y

deff fn [24]

Answer:

3.23%

Step-by-step explanation:

The rate is acquired from 1100 = (1+r)^3 *1000. then r is equal to 3.23%.

7 0

3 years ago

um sapato é vendido a r$ 180,00. se a compra for a vista a loja oferece um desconto de 10%. qual o valordo sapato na compra a vi

WARRIOR [948]

Preço de um sapato = $ 180,00

Desconto concedido se o sapato for comprado em dinheiro = 10%

Custo do calçado quando comprado à vista :

$=\tt 180 - 10\% \: \: de \: \: 180$

$= \tt180 - \frac{10}{100} \times 180$

$=\tt180 - \frac{10 \times 180}{100}$

$= \tt180 - \frac{1800}{100}$

$=\tt 180 - 18$

$\color{plum} =\tt\$162.00$

▪︎<em>Assim, preço do sapato quando comprado em dinheiro = $ 162,00</em>

3 0

3 years ago

I dont understand this

Reptile [31]

Answer:

18°

Step-by-step explanation:

1. ∠A and ∠B are complementary angles, so they add up to 90°.

This means that 2x - 4 + 5x + 17 = 90

2. To find the measure of ∠A, we first have to solve for x.

3. (Solving)

Step 1: Simplify both sides of the equation.

$(2x+5x)+(-4+17)=90$
$7x+13 = 90$

Step 2: Subtract 13 from both sides.

$7x + 13 - 13 = 90 - 13$
$7x = 77$

Step 3: Divide both sides by 7.

$\frac{7x}{7} = \frac{77}{7}$
$x = 11$

4. Now that we know x = 11, let's plug that value into (2x - 4) to find the measure of Angle A.

$2(11)-4$

$22-4$
$18$

Therefore, the measure of ∠A = 18°.

6 0

3 years ago

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Write the expression in simplest radical form. Write the expression in simplest radical form. The image is below only answer if

Anna [14]

Answer:

Step-by-step explanation:

$2\sqrt{35$

4 0

1 year ago