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3 years ago

Please help me with these five math questions

Mathematics

1 answer:

kykrilka [37]3 years ago

8 0

1.) false

2.) true

3.) k=.7777777

4.) 15 3/4-m=8 1/4

5.) m=7 1/2

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X^2+8x=9 _________=0 ___ ___=0 solution set: ___

pogonyaev

Answer:

Use the formula

(

)

in order to create a new term. Solve for

by using this term to complete the square.

−

Step-by-step explanation:

Use the formula

(

)

in order to create a new term. Solve for

by using this term to complete the square.

−

8 0

3 years ago

Dr. Hoover, a pediatrician, has 3 annual checkups and 2 sick visits scheduled next Tuesday,

Jet001 [13]

Dr. Hoover allot his time on Tuesday for an annual checkup is 147 minutes and for a sick visit is 42 minutes (Total 189 minutes)

On Wednesday appointment, he allot his time for an annual checkup is 147 minutes and for a sick visit is 21 minutes (Total 168 minutes)

solution

Let us assume, minutes for annual checkup denoted as x and

minutes for sick visit denoted as y

The equation of Tuesday visit is $3x + 2y = 189 minutes ------ 1$

The equation of Wednesday visit is $3x + 1y = 168 minutes ------ 2$

by changing the signs of the equation 2 and subtract it from the equation 1 we will get 1y = 21 minutes

to substitute y =1 in the equation 2 we get

$3x + 2(21) = 189$

$3x + 42 = 189$

$3x = 189 - 42$

$3x = 147$

$x = 147 ÷ 3 = 49 minutes$

then now we have substitute both x = 49 and y= 21 in equation ----- 2

we will prove that $3x + 2y = 189 = 3 (49) + 2(21) = 189$ $147+ 42 = 189 minutes$

so the Tuesday appointment , the time allotted for an annual checkup is 147 minutes and for a sick visit is 42 minutes (Total 189 minutes)

On Wednesday appointment, the time allotted for an annual checkup is 147 minutes and for a sick visit is 21 minutes (Total 168 minutes)

6 0

3 years ago

What is 5 1/2 × 2 1/3

Elanso [62]

Answer: 77/6 Answer as a mixed number: 12 5/6

7 0

3 years ago

Read 2 more answers

The Helheim glacier in Greenland enters the ocean in a 6.3 kilometer wide fjord. The terminus of the glacier retreated 7.5 kilom

vladimir1956 [14]

Answer:

7.56 km²

Step-by-step explanation:

Given data:

Width of the fjord, w = 6.3 km

Retreated terminus of the glacier between may 2001 and June 2005, d = 7.5 km

thus, the length lost , y = 7.5 - 6.3 = 1.2 km

now, the area is given as:

A = Length × width

on substituting the values, we get

A = 1.2 × 6.3

A = 7.56 km²

Hence, the surface area lost by the glacier in the fjord is 7.56 km²

7 0

3 years ago

What is the solution of the equation?

pantera1 [17]

4.7x + 3.8 = 13.2
4.7x + 3.8 - 3.8= 13.2 - 3.8
4.7x = 9.4
x = 2

answer is D. 2

7 0

3 years ago

Read 2 more answers