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2 years ago

6

Twice the sum of the number and 10 is 60 what is the number?

1 answer:

n200080 [17]2 years ago

5 0

Let the number be n

$\\ \sf\longmapsto 2(n+10)=60$

$\\ \sf\longmapsto n+10=60/2$

$\\ \sf\longmapsto n+10=30$

$\\ \sf\longmapsto n=30-10$

$\\ \sf\longmapsto n=20$

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Help me with this pls

astra-53 [7]

14 + 7 * 54 / 6 - 7

Use PEMDAS

There are no parenthesis nor exponents so move on to multiplying and dividing work left to right!

14 + 7 * 54 / 6 - 7
14 + 378 / 6 - 7
14 + 63 - 7
77 - 7
70 is your answer

7 0

3 years ago

Read 2 more answers

A football is kicked toward an end zone with an initial vertical velocity of 30 ft/s. The function h(t) = -16+ 30t models the he

Ulleksa [173]

Answer:

A. The football does not reach a height of 15ft

Step-by-step explanation:

Given

$h(t) = -16t^2 + 30t$

Required

Determine which of the options is true

The option illustrates the height reached by the ball.

To solve this, we make use of maximum of a function

For a function f(x)

Such that:

$f(x) = ax^2 + bx + c$ :

$f(\frac{-b}{2a}) = maximum/minimum$

i.e we first solve for $\frac{-b}{2a}$

Then substitute $\frac{-b}{2a}$ for x in $f(x) = ax^2 + bx + c$

In our case:

First we need to solve $\frac{-b}{2a}$

Then substitute $\frac{-b}{2a}$ for t in $h(t) = -16t^2 + 30t$

By comparison:

$b = 30$

$c = -16$

$\frac{-b}{2a} = \frac{-30}{2 * -16}$

$\frac{-b}{2a} = \frac{-30}{-32}$

$\frac{-b}{2a} = \frac{30}{32}$

$\frac{-b}{2a} = \frac{15}{16}$

Substitute $\frac{15}{16}$ for t in $h(t) = -16t^2 + 30t$

$h(\frac{15}{16}) = -16(\frac{15}{16})^2 + 30(\frac{15}{16})$

$h(\frac{15}{16}) = -16(\frac{225}{256}) + \frac{450}{16}$

$h(\frac{15}{16}) = -(\frac{225}{16}) + \frac{450}{16}$

$h(\frac{15}{16}) = \frac{-225 + 450}{16}$

$h(\frac{15}{16}) = \frac{225}{16}$

$h(\frac{15}{16}) = 14.0625$

This implies that the maximum height reached is 14.0625ft.

So, the option that answers the question is A because $14.0625 < 15$

8 0

2 years ago

2. 4x + 5y = -30<br> Slope-standard form

Lerok [7]

Y=mx+c is the slope standard form
5y=-30-4x
5y=-4x-30
Y=-4/5x-6

7 0

2 years ago

Evgen [1.6K]

Answer:

s=7w + 85..$141 in total for 8 weeks

8 0

2 years ago

8 percent of what number is 2

Sedbober [7]

8%×n=2. 2÷8/100=2×100/8=100/4=25. so the answer is 25.

5 0

2 years ago