Ask question

Ask question

All categories

3 years ago

14

Solve -7/2=-28 please solve and show work

1 answer:

Assoli18 [71]3 years ago

5 0

Step-by-step explanation:

-7/2 = -28

-7 = -28 × 2

-7 = -56

You might be interested in

A bridge connects to a tunnel as shown in the figure. The bridge is 180 feet above the ground, At a distance of 235 feet atong t

boyakko [2]

180^2 + 235^2 = (cliff base to point on bridge)^2
32400 + 55225 = 87625
so cliff base to point on bridge = sqrt of 87625.
Then notice 87625 + d^2 = (x+180)^2
since x^2 +235^2 = d^2,
substitute (x^2 + 235^2) for d^2, like this:
87625 + x^2 + 235^2 = (x+180)^2
87625 + x^2 + 55225 = x^2 + 360x + 32400
87625 + 55225 - 32400 = x^2 - x^2 +360x
360x = 110450
x = about 306.8 feet
h = x+180, so h = 486.8 feet
Remember d^2 = x^2 + 235^2, so
d^2 = 306.8^2 + 235^2
d^2 = 149354.6489
d = about 386.46 feet

6 0

3 years ago

A population of bacteria is 8500 on Day 1, 9350 on Day 2, and 10285 on Day 3.

11111nata11111 [884]

Answer:

<em>The population on 30th day will be </em><em>134836</em><em>.</em>

Step-by-step explanation:

This is a case of exponential growth. The general form of exponential function is,

$y=ab^x$

where, a and b are constants.

The data points from the question are $(1,8500),(2,9350),(3,10285)$

Putting the values in the function,

for $x=1, y=8500$

$8500=ab$ ----------1

for $x=2, y=9350$

$9350=ab^2$ ------2

Dividing equation 2 by 1,

$\Rightarrow \dfrac{ab^2}{ab}=\dfrac{9350}{8500}=1.1$

$\Rightarrow b=1.1$

Putting the value of b in equation 1,

$\Rightarrow a=\dfrac{8500}{1.1}=7727.27$

Now the function becomes,

$y=7727.27(1.1)^x$

Putting x=30, we get

$y=7727.27(1.1)^{30}=134836.2\approx 134836$

4 0

3 years ago

Read 2 more answers

Need help ASAP please!

zmey [24]

Answer:

(mark me brainliest) q=5

Step-by-step explanation:

q would be = 5

and so would the height = 5

here is the rule for 45-90-45

hypotenuse is basically the other two lengths with $\sqrt{2}$

so that is why q would be 5

7 0

3 years ago

Find the circumference of a circle with a radius of 10 m. C = 2πr, where d=diameter and C = circumference. Use pi = 3.14.

Tju [1.3M]

Answer:

3.14×20

20=diameter

=62.8cm

4 0

3 years ago

after a lady is seated in a restaurant, she realizes that she only has $48.00. if she must pay 7% sales tax and wishes to leave

Alexeev081 [22]

Answer:

$38.84

Step-by-step explanation:

1) 48.00 x 0.07 = 3.36 (she must pay this amount)

2) 48.00 x 0.1 = 4.8 (she must tip this much)

48.00 - 4.8 + 3.36 = 39.84

She has 39.84 dollars she can use to order food with.

7 0

3 years ago