3 years ago

It’s a multi step equation 2( a + 7 ) =9

Mathematics

1 answer:

max2010maxim [7]3 years ago

6 0

Answer:
a = 2.5

Explanation:
2a + 14 = 9
a = 2.5

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A circular bicycle reflector has a diameter of 5 cm. What is the approximate area of the reflector? Use 3.14 to approximate pi a

grandymaker [24]

Answer:

Step-by-step explanation:

Area=pi×radius^2 so if diameter is 5 then radius is half that which is 2.5. So it should be a=3.14 × 2.5^2. I hope that's right.

7 0

4 years ago

Find three consecutive even integers such that the sum of the first, twice the second, three times the third is -76. What is the

ss7ja [257]

Answer:

The numbers are -14,-13 and -12

Step-by-step explanation:

The correct question is

Find three consecutive integers such that the sum of the first, twice the second and three times the third is -76. What is the number?

Let

x ----> the first consecutive integer

x+1 ---> the second consecutive integer

x+2 ---> the third consecutive integer

we have that

$x+2(x+1)+3(x+2)=-76$

solve for x

apply distributive property

$x+2x+2+3x+6=-76$

Combine like terms

$6x+8=-76$

subtract 8 both sides

$6x=-76-8$

$6x=-84$

Divide by 6 both sides

$x=-14$

$x+1=-14+1=-13$

$x+2=-14+2=-12$

therefore

The numbers are -14,-13 and -12

3 0

4 years ago

Write three equivalent ratios for the given ratio 4/3

vfiekz [6]

Answer:

8/6 12/9 16/12

Step-by-step explanation:

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3 years ago

Show work to this problem

hoa [83]

X+y=70
x-y=30
x=30+y
30+y+y=70
2y=40
y=20
x+20=70
x=50
xy=(50)(20)=1000

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3 years ago

a virus infected 400 people in the town and it spread and 25% more people each day. write an exponential function to model this

Leto [7]

Answer:

Step-by-step explanation:

f(t)= a(1+r)^t

f(10)= 400(1+0.25)^10

f(10)=3725.3

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4 years ago