# Math

posted by .

If m <DCE=4x+15 and m<ECF=6X-5 ,find m<DCE

• Math -

The angles are assumed to be complimentary(sum=90o).

DCE + ECF = 90o
4x+15 + 6x-5 = 90
10x + 10 = 90
10x = 80
X = 8

DCE = 4*8 + 15 = 47o

• geometry -

Álgebra if a supplement of an angle has a measure 78 less than the measure of the angle,what are the measures of the ángeles?

• Math -

find the measure of angle DCE.

• Math -

Dick

## Similar Questions

1. ### physiology

Factors that increase the secretion of antidiuretic hormone include all of the following except: a)increased osmolarity of the ECF b) decreased renal blood flow c) increased concentration of potassium ions in the ICF d) increased concentration …
2. ### Geometry

Figure ABCD is a trapezoid with DC = (1/3) AB. What is the ratio of area ABCD to area DCE?
3. ### math

Given: segment AC and segment BD bisect each other at E prove: E is the midpoint of segment RS i don't know if you will be able to visualize the picture but just incase someone is i really need help on the proof for this one. Picture: …
4. ### math

Complete the proof. Given: ∠DCE≅∠CDE≅∠DEC; ∠CDB≅∠CBD Prove: BC≅DE a. DE≅EC≅CD because ___?
5. ### Physiology

The rate at which the Na+-K+ pump operates is not constant but is controlled by a combined effect of changes in ICF Na+ concentration and ECF K+ concentration. Do you think an increase in both ICF Na+ and ECF K+ concentrations would …
6. ### geometry

Suppose CED = DBC. If m<EDC=63 degrees and m<DBC=82 degrees, what is m<DCE?
7. ### Math

Using a pair of compasses, a ruler and a pencil. Construct a triangle CDE in which DE =10Cm Dc=8cm and< CDE=45 dregrees. Contract a line, CF, perpendicular to DE such that F lies on DE. Using a protractor, measure and state the …
8. ### Maths

In a triangle ABC, D is the midpoint of BC and E is the midpoint of AD. if area of triangle ABC is 144 meter square then find the area of triangle DCE
9. ### mats

in a triangle ABC, D is the midpoint of BC and E is the midpoint of AD. IF area of triangle ABC is 144 centimetre square then find the area of triangle DCE
10. ### Math

The problem features this image, the URL is below. h t t p :/ / a s s e t s . o p e n s t u d y . c o m / u p d a t e s / a t t a c h m e n t s / 5 6 4 c 8 1 d b e 4 b 0 d 3 c 6 6 b 1 4 5 0 c f - j e w e l r y 0 2 - 1 4 4 7 8 5 5 1 …

More Similar Questions